Good afternoon. My name is Dr. Maura Ricketts and I am the Director of Public Health for the Canadian Medical Association. The CMA appreciates the opportunity to appear before this Committee today as part of your study of clinical trials and drug approvals.
The CMA represents more than 76,000 physicians in Canada. Its mission is to serve and unite the physicians of Canada and to be the national advocate, in partnership with all Canadians, for the highest standards of health and health care.
Because prescription drugs are an essential component of health care, the CMA has developed a considerable body of policy on pharmaceutical issues. This work can be distilled into one fundamental principle: The CMA believes that our country requires a National Pharmaceutical Strategy to ensure every individual has timely access to safe, effective and affordable prescription drugs. Despite the commitment in the 2004 Health Accord to the creation of such a strategy, Canadians continue to wait for government leadership on this issue. Drugs replace more costly and invasive medical interventions. They are an essential tool in the physician's tool box.
To ensure safety and effectiveness, the CMA also believes in the need for a strong, unbiased, evidence-based system for research and approval. This is at the heart of our commitment to patient-centred care.
In evaluating whether to prescribe a new drug to a patient, a physician will weigh several factors: Does this product offer any benefits over what I am prescribing now? Will it be more effective? Will this new drug be safer? Will it solve any tricky clinical problems, such as drug interactions, or reduce side effects that prevent a medication from being used properly? The physician may also ask: What is the evidence that this new drug is an improvement? Can I trust the evidence? Where can I get access to accurate, reliable information and data on this drug?
Pre-approval drug research must provide answers to these fundamental questions.
I will now focus on two particular issues of concern to practising physicians with regard to clinical trials:
* First, what is being compared to what? Clinical trials may be sufficient for Health Canada's regulatory purposes, but may provide only part of the information a physician needs. For example, is a new cholesterol drug effective on all patients, or only on some of them? Would other patients derive equal benefit from an already existing drug, or from a lifestyle change such as diet or exercise? The CMA recommends that researchers compare a new product to other drugs on the market - and to other interventions, as well.
* Second, is timely, reliable and objective information available on all clinical trial results, not just the positive ones? Canadians need to be informed when a drug has performed disappointingly in trials if they are to make informed decisions about their health care. The CMA, therefore, recommends the results of all clinical trials, not just those with positive results, be made available to health professionals and the public.
I would like to add that the current documentation is not very user-friendly. We recommend that Health Canada prepare summaries of the most essential data, not only for physicians, but for all Canadians to be able to access this information.
The Drug Approval Process
Turning now to the drug approval process, the CMA believes the following principles should apply:
* The primary criteria for approval should be whether the drug improves health outcomes and offers an improvement over products currently on the market.
* The review process should be as timely as is consistent with ensuring optimal health outcomes and the safety of the drug supply.
* The review process should be impartial and founded on the best available scientific evidence.
* The review process should be open and transparent.
* Finally, approval of a drug is not an endpoint, but rather one step in that drug's life cycle. It is not uncommon to identify serious safety hazards after a drug has been approved, because that's when it first goes into wide use. It is important that the approval process be complemented by a rigorous and vigilant post-market surveillance process. We look forward to presenting our recommendations on this subject to your Committee at a future session.
Before closing, I would like to briefly address two other matters:
First, the issue of drugs for rare disorders. We are aware that the current clinical trial and approval processes, which place a high value on studies with large population samples, may be unable to adequately capture the value of drugs that are prescribed to only a handful of people. Some patient groups active in the area of rare disorders, such as the Canadian MPS Society and Alpha-1 Canada, have shared their concerns about this with us. These groups, along with the Canadian Organization for Rare Disorders, have been advocating for years for a fair process for evaluating drugs for rare diseases. Because Canada doesn't have a rare disorders strategy, Canadian patients have access to fewer therapies than patients in other developed countries. The issue of how to approve drugs for rare disorders merits closer consideration. The CMA recommends that the federal government develop a policy on drugs for rare disorders that encourages their development, call for ongoing evaluation of their effectiveness, and ensures fairness so that all patients who might benefit have reasonable access to them.
The second matter is that Health Canada's review process provides little guidance on another question which physicians are increasingly asking: Can my patient afford this drug? It is not sufficient that the Common Drug Review conducts reviews of the cost effectiveness of drugs and that provincial/territorial formularies undertake similar studies, as the fact remains that cost is one of the factors physicians need to consider when deciding whether to prescribe a new drug. This is especially true in the case of new biologics, which are very expensive. Canadian doctors believe that the difficulty of making effective prescribing decisions without information about cost needs to be overcome. This only underscores the necessity of a National Pharmaceutical Strategy.
Thank you. We would be happy to answer your questions.
The Canadian Medical Association (CMA) is pleased to provide this submission to the House of Commons Health Committee for consideration as part of its study on drug supply in Canada. The severe impact of the disruption in production at one pharmaceutical company's manufacturing facility has demonstrated the significant shortcomings in how drug shortages are managed in Canada. This submission focuses on what is needed to ensure Canada's health care system delivers patient-centred care.
In order to deliver the best possible care to patients, physicians require timely, comprehensive and accurate information about current and anticipated drug supply shocks and constraints. With this objective in mind, we have provided input to the government and to the pharmaceutical industries. Further, Canada requires an uninterrupted supply of medically necessary medication for patients.
Impacts on Patients and the Health Care System
Canada's doctors are deeply concerned about the persistent shortages of drugs that they and their patients are encountering. Prescription drugs can prevent serious disease, reduce hospital stays, replace surgical treatment and improve a patient's capacity to function productively in the community. Pharmaceuticals benefit the health care system by reducing costs in other areas such as hospital stays and disability payments. Disruptions in the supply of pharmaceuticals can impact patient care, patient health and the efficiency of the overall health care system.
At the CMA, patient organizations are telling us about the anxiety, pain and harm that drug shortages are inflicting on patients. Below are excerpts of these experiences:
* According to the Brain Injury Association of Canada: "Any drug medication shortage endangers Canadian patients. In the brain injury community, anti-depressants are prescribed to some, as is pain medication, so if there is a shortage some members in the community will be endangered even if the medication is altered."
* The interim-president of the Canadian Arthritis Patient Alliance, Louise Bergeron, wrote CMA to say: "Actually, I have had this happen to me on three occasions and it is quite scary when you know you will not have access to certain drugs for an extended period of time, since you know your health will be on the line."
* Sharon Baxter, Executive Director, of the Canadian Hospice Palliative Care Association, says: "All are encouraging the government to find a solution very quickly as pain medication at the end of life is essential and urgent. I don't think we are at the stage where people are dying without access, but getting to that end is totally unacceptable in a country like Canada."
Among the impacts of drug shortages are:
* delays in access to needed medication;
* delays or disruptions to clinical treatment;
* delayed or cancelled surgeries;
* loss of therapeutic effectiveness when an appropriate alternate therapy is not available;
* increased risk of side effects when alternate therapies are used; and
* increased non-compliance when patients, particularly those on long-term therapy, find it harder to comply with a new medication regime.
Any one of these situations can impact patient health, particularly in patients with complex problems. In many instances, this in turn leads to a greater demand on the health care system, whether in physician visits or emergency room treatments.
In a survey of physicians conducted by the CMA in 2011, two-thirds of respondents said that the shortage of generic drugs had had negative consequences for their patients or practice.
Of these physicians, 22 per cent indicated that the consequences were that their patient suffered clinical deterioration because an alternate drug was substituted. Similarly, in a survey of pharmacists by the Canadian Pharmacists Association in 2011, 69 per cent of respondents indicated that they believed that patients' health outcomes had been adversely affected by drug shortages.
Notably, of the physicians who indicated the shortage of generics resulted in consequences to their patients or practice, 28 per cent reported that their patient did not fill the substitution prescription due to the cost of the medication. Numerous respondents raised concerns about the financial impact of substitute medications on patients.
Survey responses also shed light on the increased demand on the health care system created by the lack of information on drug shortages provided to physicians. When physicians are not made aware of a drug shortage, and prescribe that medication, they later have to provide the patient with a new prescription, which often requires an additional patient visit. Better informing physicians about drug shortages can reduce demand on the health care system by eliminating the inefficiencies associated with drug shortages.
Scope of Drug Shortages
In an attempt to outline the scope of the problem, the Canadian Agency for Drugs and Technologies in Health (CADTH) stated that:
"It is difficult to quantify and determine the extent of drug shortages in Canada because manufacturers are not required to report disruptions in drug supply to Health Canada and because there is no single accountable Canadian organization that provides system-wide drug distribution oversight."i
Surveys by the CMA and the Canadian Pharmacists Association (CPA) shed light on the lack of drug shortages management in Canada. Taken together, the results of these surveys paint an alarming picture of drug shortages management in Canada and underscore the need to improve our system.
In terms of notification, the majority of physicians and pharmacists indicated they never (51 per cent and 29 per cent) or infrequently (32 per cent and 33 per cent) receive advance notice of shortages. Ironically, given the high proportion of pharmacists reporting they never or infrequently receive notice, 65 per cent of physicians indicated that they receive notification from pharmacists. Meanwhile, 30 per cent of physicians also indicated that they were notified of drug shortages by their patients.
Alarmingly, 81 per cent of the pharmacists surveyed indicated they had trouble locating medications to fill a prescription during their last shift prior to completing the survey and 93 per cent had difficulty over the week prior.
This is not a new problem, but since we surveyed CMA members in the fall of 2011, the situation has worsened. Currently about 250 medications are listed on Canadian drug shortage websites. Before the dire impact of the loss of production at Sandoz, Canadian hospitals were already dealing with shortages in the supply of sterile injectables - critical in specialties like surgery, oncology and anesthesia.
What Canada's Doctors Require to Provide Care
Physicians have expressed their frustration at the time it takes to find an appropriate drug for substitution - time taken from the physician, the pharmacy and the patient. Time better spent with patients is being used by physicians to work with pharmacists to identify alternative drugs and therapies.
Of greatest concern are those drugs that are single sourced. When single source medications are in short supply, there are no clear substitutes. The impact of this is being felt now in hospitals across the country as they grapple with the loss of numerous Sandoz products and are forced to ration the remaining stock.
The majority of physicians surveyed by the CMA indicated that greater knowledge of drug supply issues would allow them to deliver better patient care.
To this end, the CMA strongly supports the development of a comprehensive system for monitoring and responding to domestic shortages of medically necessary drugs. Canada needs a sustainable, adequately resourced system to: identify shortages, rapidly and proactively inform health care professionals, and respond quickly to allocate supply as needed to resolve shortages.
The CMA has provided input to both industry and government on the key information needs of doctors. These are:
* Information about the product in short supply;
* Expected duration of the shortage;
* Therapeutic alternatives;
* Regions affected;
* Notification of the end of the shortage.
While the recent establishment of the online inventories by the pharmaceutical industry associations marks an improvement in Canada's management of drug shortages, significant issues remain to be addressed. These include the need for: complete and more consistent information; automatic notifications to alert physicians, pharmacists and other health care providers; a mechanism to prevent potential disruptions; and a mechanism to seek new or interim sources of supply during a shortage.
The CMA recognizes that other countries are also grappling with drug shortages. Canada must also work with its partners abroad to find an international solution to this phenomenon.
Drug shortages management in Canada has significant shortcomings that impact patients, doctors and the health care system. With the current shortage of injectable drugs teetering on the verge of a crisis, quick action and cooperation are required to address the supply shock.
The CMA calls on Members of Parliament to exercise leadership to ensure that Canada's health care providers have access to the information necessary for them to care for their patients, and that Canadians have access to medically necessary drugs.
i Canadian Agency for Drugs and Technologies in Health. (2011) "Environmental Scan: Drug Supply Disruptions." Ottawa: CADTH, accessed online at: http://www.cadth.ca/media/pdf/Drug_Supply_Disruptions_es-18_e.pdf, 1.
The Canadian Medical Association is pleased to take part in the second phase of the study of prescription pharmaceuticals by the Senate Standing Committee on Social Affairs, Science and Technology. During the first phase, we presented the CMA's policy position regarding clinical trials and the process for approving new drugs for use. In this phase we will discuss our position and recommendations on post-approval surveillance of prescription drugs.
The Canadian Medical Association represents 76,000 physicians in Canada. Its mission is to serve and unite the physicians of Canada and to be the national advocate, in partnership with the people of Canada, for the highest standards of health and health care.
Prescription drugs are a very important part of high quality and cost-effective health care. They can prevent serious disease, reduce the need for hospital stays, replace surgical treatment and improve a patient's capacity to function productively in the community. Therefore, the CMA has developed a substantial body of policy on pharmaceutical issues, including on the post-approval surveillance of prescription drugs.
The essence of our position is contained in our first recommendation:
The CMA recommends that federal and provincial/territorial governments collaborate to develop and implement a national pharmaceutical strategy to ensure that every Canadian has timely access to an adequate supply of safe and effective prescription drugs.
This recommendation has two elements: "safe and effective" and "adequate supply," both of which we will discuss in this submission.
2) Ensuring Safety and Effectiveness
As we have previously told this Committee, the CMA supports a robust regulatory framework and system for researching and approving new pharmaceutical products. But however strong Canada's pre-approval system is, it will not identify all potential problems with a new drug. Pre-approval clinical trials tend to focus on small numbers of patients, and exclude vulnerable groups such as children and the elderly. They also tend to be of short duration, whereas in the real world, patients may take these drugs for years. As a consequence, problems with a drug are often identified only after widespread, long-term use in the general population. For this reason, it is essential that Canada have in place a robust regulatory framework that includes a timely system to monitor the performance of prescription drugs after they come on the market.
The Government of Canada has taken several recent steps to enhance its drug surveillance system. In 2009, it established the Drug Safety and Effectiveness Research Network. In 2008, it introduced Bill C-51, An Act to Amend the Food and Drugs Act, to improve drug safety and effectiveness monitoring by Health Canada. Unfortunately, the bill died with the 2008 election call and has not been re-introduced. That is why we are pleased that the Senate has chosen to re-open this issue.
What would a comprehensive post-approval surveillance regulatory framework and system look like? In order to effectively monitor the safety and effectiveness of the country's drug supply, the CMA believes it should include:
a) Comprehensive processes for gathering drug safety and effectiveness data
In gathering data about adverse drug reactions (ADRs) in Canada, Health Canada has traditionally relied on spontaneous reports from manufacturers and health professionals. The government could enhance its capacity to gather information by:
* making it easier for physicians and other health professionals to report ADRs voluntarily. This can be accomplished by making the reporting system user-friendly and easy to incorporate into a practitioner's busy schedule. Health Canada has improved the process by introducing online reporting, which may have contributed to the significant increase in the number of ADR reports over the past 10 years. The reporting process could be made even more efficient by incorporating it directly into the Electronic Medical Record (EMR) as this is developed.
* augmenting spontaneous reports with information gathered through other, more systematic means. These could include formal post-market studies of specific drugs, or recruitment of "sentinel" groups of health care providers who would contract to report ADRs in detail, and who, because of these contractual obligations, would be committed to assiduous reporting.
b) A capacity for rigorous and timely data analysis to identify significant threats to drug safety.
Information gathering does not in itself constitute post-market surveillance. In our opinion, the most important element of the process is the monitoring and analysis that occurs once an adverse drug reaction (ADR) report has been received.
Monitoring capacity requires rigorous data analysis that can sort "signal from noise" - in other words, sift through the reports, find the ones that indicate unusual events, investigate their cause, and isolate those that indicate a serious health risk. It also requires that the analysis be timely: we note that in 2011 the Auditor General was particularly critical of Health Canada's post-market surveillance timeliness, noting that it could take several years for reports to be reviewed internally.
Post-market monitoring should do more than identify safety risks. It should also provide information about a drug's efficacy and effectiveness. Does it achieve the health outcome for which it is being marketed? Does it perform better than other drugs or therapies for the same condition?
c) Communication of useful information to health care providers and the public.
When new information is uncovered about a prescription drug, it is important that physicians and other health professionals are made aware of it as quickly and efficiently as possible. Therefore, post-approval surveillance requires a system for communicating timely, reliable and objective information to physicians and other health professionals, which they can absorb quickly and incorporate into their everyday practice. Ideally, this communication would report not the safety problem alone but also its implications for their patients and practice: for example, whether some patients are particularly at risk, or whether therapeutic alternatives are available.
The CMA recommends that Health Canada continue to improve the capacity of its post-approval surveillance system to:
* Make it easier for health professionals to submit voluntary ADR reports;
* Analyze the data that has been gathered in a rigorous and timely manner; and
* Communicate essential information to health care providers and the public in a timely and user-friendly manner.
d) Increased regulatory authority for Health Canada
Drug safety is a serious issue; recent research has revealed that nearly a quarter of new drugs approved in Canada will eventually receive a serious safety warning1. Given the potential risks to patient safety we believe Health Canada should have the legal authority to take strong action when a safety problem is identified.
The CMA recommends that Health Canada should be given the authority to:
* require post-market studies of newly approved drugs if clinical trials identify possible safety risks;
* require manufacturers to disclose information if Health Canada thinks it germane to making a decision in the interest of patient safety; and
* take action if post-market research uncovers new safety concerns. This could mean ordering changes to product labels, or pulling a product off the market.
Granting Health Canada this regulatory authority is only the first step. Health Canada should not hesitate to use this authority if the situation warrants.
3) Ensuring an Adequate Drug Supply
In the past few years Canada's doctors have become deeply concerned about the persistent shortages of drugs that they and their patients are encountering. In a survey of physicians conducted by the CMA in September 2012, two-thirds of respondents said that the shortage of drugs was a significant issue in terms of its impact on patient care and outcomes. Of these physicians, 70 per cent indicated that their patient received a less effective medication, and 20 per cent had patients who had suffered clinical deterioration because an alternate drug was substituted. This in turn leads to a greater demand on the health care system, whether in physician visits or emergency room treatments. Twenty-three per cent reported that their patient suffered financially due to the cost of the substituted medication, since many of the drugs in short supply are older, low-cost generics.
The lack of information about shortages compounds the stress of dealing with them. When physicians prescribe a medication, unaware that it is in short supply, they later have to provide the patient with a new prescription, which often requires an additional patient visit. Physicians have expressed their frustration at the time it takes to find an appropriate substitute drug - time which could better be spent in patient care.
As a consequence, the CMA strongly supports the development of a comprehensive system for monitoring domestic shortages of medically necessary drugs. To be of greatest benefit to doctors, such a system should include:
* Information about the product in short supply;
* Expected duration of the shortage;
* Therapeutic alternatives;
* Regions affected;
* Notification of the end of the shortage.
Although pharmaceutical industry associations and drug manufacturers are now supporting a drug shortage reporting website (http://www.drugshortages.ca/drugshortages.asp), there is room for improvement. The reporting website does not yet capture all of the drug product shortages. It must become more user friendly for health practitioners and the public, with search and sort functions to easily find product listings. In addition, a mechanism to obtain information on possible therapeutic substitutions would be of value to practitioners.
The CMA recommends that Health Canada work with provincial and territorial governments, industry groups and health professionals to enhance the current system for reporting drug shortages and ensure its sustainability.
Finally, while a reporting system to provide information to health professionals and Canadians on drug shortages is valuable, it is essential that Canada address the root causes of drug shortages. A review of the supply processes, both domestic and international, is strongly recommended.
While the CMA acknowledges that provinces are responsible for purchasing drugs, we believe that solutions will be stronger if all provinces, and the federal government, work together on them. And since drug shortages are an international concern, it is the responsibility of the Government of Canada to work with other countries in seeking solutions.
The CMA supports an investigation into the underlying causes of prescription drug shortages in Canada.
4) Other Important Elements of a National Pharmaceutical Strategy
As Recommendation 1 states, the CMA believes that Canada's federal and provincial/territorial governments should implement a national pharmaceutical strategy, one of whose objectives would be to ensure an adequate supply of prescription drugs. The strategy should address other important objectives, as well, notably:
* ensuring comprehensive prescription drug coverage for all Canadians. According to a recent CMA survey, one in 10 Canadians has gone without a prescription drug because they couldn't afford it. Governments should work with private insurers and other stakeholders to develop a system to provide equitable, comprehensive prescription drug coverage to all Canadians.
* encouraging optimal prescribing by health professionals. To accomplish this, the CMA has recommended a strategy that includes education, user-friendly guidelines and practice tools, and the provision of impartial information to health professionals and the public.
Once again, we commend the Senate Social Affairs Committee for bringing this issue to your table. Canada's physicians are prepared to work with governments, health professionals and the public in strengthening Canada's post-approval surveillance system, to ensure that the prescription drugs Canadians receive are safe and effective and in adequate supply.
1 Lexchin J. New drugs and safety: what happened to new active substances approved in Canada between 1995 and 2010? Arch Intern Med. 2012;():1-2. doi:10.1001/archinternmed.2012.4444.
The Canadian Medical Association and provincial/territorial medical associations will work with governments to accelerate the introduction of e-prescribing in Canada to make it the main method of prescribing by 2012.
The Canadian Medical Association and provincial/territorial medical associations will work with governments to accelerate the introduction of e-prescribing in Canada to make it the main method of prescribing by 2012.
The Canadian Medical Association and provincial/territorial medical associations will work with governments to accelerate the introduction of e-prescribing in Canada to make it the main method of prescribing by 2012.
The Canadian Medical Association appreciates this opportunity to respond to Health Canada’s consultation on the proposed regulations for edible cannabis, cannabis extracts, and cannabis topicals.
The CMA’s approach to cannabis is grounded in public health policy. It includes promotion of health and prevention of problematic use; access to assessment, counselling and treatment services; and a harm reduction perspective. The CMA endorsed the Lower-Risk Cannabis Use Guidelines and has expressed these views in our recommendations to the Task Force on Cannabis Legalization and Regulation, recommendations regarding Bill C-45. As well, we submitted comments to Health Canada with respect to the consultation on the proposed regulatory approach for the Cannabis Act, Bill C-45.
Canada’s physicians have a longstanding concern about the health risks associated with consuming cannabis. , Consumers use these products for both recreational and medical purposes, compelling the need for accuracy in the labeling as well as quality control in the manufacturing process.10
Cannabis Edibles, Extracts and Topicals
Cannabis will have a different effect on the user, depending on whether it is smoked or ingested, as in an edible. It has been found that “smoking marijuana results in clinical effects within 10 minutes, peak blood concentrations occur between 30 and 90 minutes, and clearance is complete within 4 hours of inhalation. Oral THC does not reach significant blood concentration until at least 30 minutes, with a peak at approximately 3 hours, and clearance approximately 12 hours after ingestion.” Because of the delay in absorption when ingested, people might consume more to feel the psychoactive effects faster. This might lead to the consumption of very high doses and result in toxic effects, such as anxiety, paranoia and in rare cases, a psychotic reaction with delusions, hallucinations, incoherent speech and agitation.
Rates of use of edibles are not well known. A recent study in California high schools found that “polyuse via multiple administration methods was a predominant pattern of cannabis use and report the first evidence, to our knowledge, of triple product polyuse of combustible, edible, and vaporized cannabis among youths.”
We are limiting our response to Health Canada’s consultation questions that pertain to the CMA’s position with respect to cannabis and relate to our expertise and knowledge base.
Proposed THC limits for the new classes of cannabis products
Standardization within all classes of cannabis products in a legal regime is essential. Tetrahydrocannabinol (THC) levels in black market products can vary widely so one can never be assured of the strength being purchased, creating the potential for significant harm. ,
Experience in jurisdictions where cannabis has been legalized has shown that restrictions on the potency of products (i.e., THC limits) are necessary, given the higher risks of harm associated with higher potencies.2 Prohibition of high potency products is important.3
THC limits should be based on the best available evidence of safety for consumers. The increased potency of cannabis over the years raises concerns about its use in edibles, extracts and topicals, offering a significant challenge with respect to regulating their use. This becomes particularly worrisome with respect to preadolescents and adolescents who should avoid using cannabis due to concerns with the impact on the developing brain.2 Use has been associated with a “significant increased risk of developing depression or suicidality in young adulthood.”
More research is needed with respect to the effects of cannabis on all age groups, especially children, adolescents and seniors. Saunders et al describe the case of an elderly patient with a history of coronary artery disease suffering what appears to have been a myocardial infarction after ingesting most of a marijuana lollipop that contained 90 mg of THC. Such cases demonstrate how crucial it is to establish appropriate levels of THC. This is an especially important consideration because “consuming cannabis-infused edibles may inadvertently result in toxicity because absorption can take hours, compared with minutes when smoking. An individual who does not yet feel an effect may over-consume.”
Small children and people with cognitive impairment will not be able to read labels, so preventive measures are very important, as with any pharmaceutical. Since legalizing cannabis, Colorado’s Rocky Mountain Poison & Drug Center has reported an increase in calls related to edible exposures. Children can accidentally eat products that contain cannabis, making them ill enough to seek medical assistance.
The CMA maintains that the proposed draft regulations of 10 mg per discrete unit and package is too high and should be established at a maximum of 5 mg per dose, given the higher risks of overconsumption with edibles, the risks of accidents in children and the experience in other jurisdictions. Colorado’s limit was set at 10 mg per unit, and health authorities recognize that a lower limit would have been warranted to prevent more accidents. Other preventive measures, such as child proof packaging, are considered in other sections of this brief.
The amount of THC must be displayed clearly and prominently on the package to help prevent accidental or overconsumption of the product.
Rules addressing the types of ingredients and additives that could be used in edible cannabis, cannabis extracts, and cannabis topicals appropriately address public health and safety risks while enabling sufficient product diversity
The CMA concurs with the proposed regulations. Experience in areas such as caffeinated, high-sugar alcoholic beverages provides ample evidence to proceed with restraint concerning the types of ingredients and additives that may be permitted in edible cannabis, cannabis extracts, and cannabis topicals.
Proposed new rules for the packaging and labelling of the new classes of cannabis products
The CMA reiterates its position with respect to the packaging and labelling of cannabis products as presented in its submission on the proposed approach to the regulation of cannabis.5 This includes:
a requirement for plain and standard packaging
prohibition of the use of appealing flavours and shapes,
a requirement for adequate content and potency labelling,
a requirement for comprehensive health warnings,
a requirement for childproof packaging, and
a requirement that the content in a package should not be sufficient to cause an overdose.
Plain and standardized packaging is necessary with respect to edibles as their wider availability raises several public health issues, not the least of which is ingestion by young children. It is imperative that the packages and labels of edibles not resemble popular confectionaries, for example. As the Canadian Paediatric Society has noted, “the unintended consumption of edibles manufactured to look like sweets by younger children is particularly concerning.”15 Also, by “restricting the extent to which marijuana edibles can look and taste like familiar sweets, (it) could also keep the psychological barriers to marijuana initiation among children and adolescents from being lowered.” The CMA has adopted similar positions with respect to tobacco and vaping products. , ,
It is recognized that these regulations are targeted at products meant for the adult market, but the entry of these new classes also creates challenges beyond that audience. Teens are attracted to vaping cannabis rather than smoking it because “smoke is not combusted and also may allow for more covert use given the reduction in odor.” , As well, as “edibles have no odor, they are largely undetectable to parents.”23
The CMA views this as an opportunity to educate Canadians about the health, social and economic harms of cannabis especially in young people. Package inserts must outline and reinforce the health risks involved; they must also be designed by governments and health professionals, not cannabis producers or distributors.
Inserts should include:5
information on securing the product in the home to prevent access by youth and children,
recommendations not to drive or to work with hazardous chemicals or operate equipment while using the contents of the package,
information on the health and social consequences (including legal penalties) of providing cannabis to those under a designated minimum age for purchasing, and
contact information for hotlines for poison control and for crisis support.
Cannabis topicals, as outlined in the proposed regulations, would fall under the category of health products and be found in non-prescription drugs, natural health products, and cosmetics. The CMA believes that all health claims need to be substantiated with sufficient evidence that meets standards for efficacy, besides safety and quality, to protect Canadians from misleading claims.5 This is important because the level of proof required to obtain a Drug Identification Number (DIN) for prescription drugs is considerably higher than the level of proof required for a Natural Product Number (NPN); rigorous scientific evidence for effectiveness is needed for a DIN but not for an NPN. Consumers generally do not know about this distinction, believing that Health Canada has applied the same level of scrutiny to the health claims made for every product.5
Requirements for tamper-resistant and child-proof containers need to be in place to enhance consumer safety. More research is required to address the environmental concerns with extra packaging, which would result from single dose packaging. It is critical to put in place measures that make it difficult to ingest large doses of THC. Simply adding grooves to chocolate bars or baked goods, for example, separating different doses, is insufficient to prevent people, particularly children, from ingesting more than a dose (which in of itself is designed for an adult). As well, there is no guarantee that the THC is spread out uniformly throughout the product.
More research is needed with respect to “determining risks and benefits through proper clinical trials;” that includes determining the safest level of THC for extracts and topicals to reassure consumers will not be harmed by these products.18
With regards to cannabidiol (CBD), it would seem that “published data from around the world has taught us that misleading labels as well as harmful contaminants are real and actual problems for CBD products.”18 Health claims need to be substantiated via a strong evidentiary process. There will be a need for careful monitoring of the health products released in the market and the health claims made.5 Experience has shown that regulations can and will be circumvented, and these activities will have to be addressed.
Edible cannabis and the requirement for all products to be labelled with a cannabis-specific nutrition facts table
Yes. The CMA supports the use of a cannabis-specific nutrition facts table (NFT) as described in the proposed regulations.1 These products should have the same standards and regulations applied to them as traditional food products do under the Food and Drugs Regulations. As such, a cannabis-specific nutrition facts table will help consumers differentiate them from standard food products.
The proposal for the labelling of small containers and the option to display certain information on a peel-back or accordion panel
The size of the container should not be an impediment to supplying consumers with the necessary information to make informed choices. Manufacturers should be required to use whatever method (peel-back or accordion panel) is most efficient and conveys all the necessary information. As the CMA noted in a recent brief with respect to tobacco labeling the “amount of space given to the warnings should be sufficient to convey the maximum amount of information while remaining clear, visible, and legible. The warnings should be in proportion to the packaging available, like that of a regular cigarette package.”20 Adding warnings on individual cigarettes, as we recommended, illustrates that it is feasible to apply important information to even the smallest surfaces.20
It is important to note that key information should be visible on the external part of the container, including the standardized cannabis symbol, ingredients and warnings.
Proposal that the standardized cannabis symbol would be required on vaping devices, vaping cartridges, and wrappers
Yes. As noted earlier, the CMA called for strict packaging requirements around both tobacco and vaping products.22 The requirement for the standardized cannabis symbol is an extension of that policy and to the labelling of cannabis products in general.5
Proposed new good production practices, such as the requirement to have a Preventive Control Plan, appropriately address the risks associated with the production of cannabis, including the risk of product contamination and cross-contamination
Yes. The CMA concurs with this requirement.
The requirement that the production of edible cannabis could not occur in a building where conventional food is produced
Yes. The CMA concurs with this requirement. Separate facilities are necessary to prevent cross-contamination for the protection of consumer health and safety.
The CMA supports the federal government’s commitment to a three-year legislative review as it affords the opportunity to evaluate the regulations’ impact and adjust them as needed. It continues to be important to have good surveillance and monitoring systems, as well as to continue to learn from other jurisdictions where cannabis is legal for recreational purposes.
Public education and awareness must accompany the introduction of new forms of cannabis, emphasizing the risks of accidental ingestion and overconsumption. It should also emphasize the need for safe storage of cannabis products, as well as personal possession limits.
Much more research is needed into the impact of these new classes across all age groups, and into public health strategies that discourage use and increase harm reduction practices. It is fundamental that profit driven commercialization is rigorously controlled through taxation, regulation, monitoring and advertising controls, in a manner that is consistent with a public health approach.
Government of Canada. Canada Gazette, Part I, Volume 152, Number 51: Regulations Amending the Cannabis Regulations (New Classes of Cannabis) Ottawa: Health Canada; 2018. Available: http://www.gazette.gc.ca/rp-pr/p1/2018/2018-12-22/html/reg4-eng.html (accessed 2018 Dec 22).
Fischer B, Russell C, Sabioni P, et al. Lower-risk cannabis use guidelines: A comprehensive update of
evidence and recommendations. AJPH. 2017 Aug;107(8):e1-e12. Available: https://ajph.aphapublications.org/doi/abs/10.2105/AJPH.2017.303818?url_ver=Z39.88-2003&rfr_id=ori%3Arid%3Acrossref.org&rfr_dat=cr_pub%3Dpubmed& (accessed 2019 Feb 01).
Canadian Medical Association (CMA). Legalization, regulation and restriction of access to marijuana.
CMA submission to the Government of Canada – Task Force on cannabis, legalization and regulation.
Ottawa: CMA; 2016 Aug 29. Available: https://policybase.cma.ca/en/permalink/policy11954 (accessed 2019 Feb 01).
Canadian Medical Association (CMA). Bill C-45: The Cannabis Act. Submission to the House of
Commons Health Committee. Ottawa: CMA; 2017 Aug 18. Available: https://policybase.cma.ca/en/permalink/policy13723 (accessed 2019 Feb 01).
Canadian Medical Association (CMA). Proposed Approach to the Regulation of Cannabis. Ottawa: CMA; 2018 Jan 19. Available: https://policybase.cma.ca/en/permalink/policy13838 (accessed 2019 Feb 04).
Canadian Medical Association (CMA). Health risks and harms associated with the use of marijuana.
CMA Submission to the House of Commons Standing Committee on Health. Ottawa: CMA; 2014. Available: https://policybase.cma.ca/en/permalink/policy11138 (accessed 2019 Feb 14).
Canadian Medical Association (CMA). A public health perspective on cannabis and other illegal drugs.
CMA Submission to the Special Senate Committee on Illegal Drugs. Ottawa: CMA; 2002. Available: https://policybase.cma.ca/en/permalink/policy1968 (accessed 2019 Feb 14).
Monte A, Zane R, Heard K. The Implications of Marijuana Legalization in Colorado JAMA. 2015 January 20; 313(3): 241–242 Available: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4404298/ (accessed 2019 Feb 15).
Peters E, Bae D, Barrington-Trimis J, et al. Prevalence and Sociodemographic Correlates of Adolescent Use and Polyuse of Combustible, Vaporized, and Edible Cannabis Products JAMA Network Open. 2018;1(5): e182765. Available: https://jamanetwork.com/journals/jamanetworkopen/fullarticle/2703946 (accessed 2019 Feb 15).
Wyonch R. Regulation of Edible and Concentrated Marijuana Products Intelligence Memos. Toronto: CD Howe Institute: 2018 Oct 2. Available: https://www.cdhowe.org/sites/default/files/blog_Rosalie_1002.pdf (accessed 2019 Feb 01).
Vandrey R, Raber JC, Raber ME, et al. Cannabinoid Dose and Label Accuracy in Edible Medical Cannabis Products. Research Letter JAMA 2015 Jun 23-30;313(24):2491-3. Available: https://jamanetwork.com/journals/jama/fullarticle/2338239 (accessed 2019 Feb 06).
Cascini F, Aiello C, Di Tanna G. Increasing Delta-9-Tetrahydrocannabinol ( -9-THC) Content in Herbal Cannabis Over Time: Systematic Review and Meta-Analysis. Curr Drug Abuse Rev. 2012 Mar;5(1):32-40. Available: https://www.datia.org/datia/resources/IncreasingDelta9.pdf (accessed 2019 Feb 14).
Gobbi G, Atkin T, Zytynski T, et al. Association of Cannabis Use in Adolescence and Risk of Depression, Anxiety, and Suicidality in Young Adulthood. A Systematic Review and Meta-analysis JAMA Psychiatry. 2019 Feb 13. doi: 10.1001/jamapsychiatry.2018.4500. Available: https://jamanetwork.com/journals/jamapsychiatry/article-abstract/2723657 (accessed 2019 Feb 15).
Saunders A, Stevenson RS. Marijuana Lollipop-Induced Myocardial Infarction. Can J Cardiol. 2019 Feb;35(2):229. Available: https://www.onlinecjc.ca/article/S0828-282X(18)31324-2/fulltext (accessed: 2019 Feb 11).
Grant CN, Bélanger RE.Cannabis and Canada’s children and youth. Paediatr Child Health. 2017 May;22(2):98-102. Available: https://www.cps.ca/en/documents/position/cannabis-children-and-youth (accessed 2019 Feb 06).
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Standardized Appearance). Ottawa: CMA; 2018. Available: https://policybase.cma.ca/en/permalink/policy13930 (accessed 2019 Feb 05).
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The Canadian Medical Association (CMA) appreciates this opportunity to respond to Health Canada’s consultation on Reducing Youth Access and Appeal of Vaping Products - Consultation on Potential Regulatory Measures.1
Canada’s physicians, who see the devastating effects of tobacco use every day in their practices, have been working for decades toward the goal of a smoke-free Canada. The CMA issued its first public warning concerning the hazards of tobacco in 1954 and has continued to advocate for the strongest possible measures to control its use.
The CMA has always supported strong, comprehensive tobacco control legislation, enacted and enforced by all levels of government, and we continue to do so. This includes electronic cigarettes (e-cigarettes). Our approach to tobacco and vaping products is grounded in public health policy. We believe it is incumbent on all levels of government in Canada to continue working on comprehensive, coordinated and effective tobacco control strategies, including vaping products, to achieve the goal of reducing smoking prevalence.
The CMA has stated its position to the federal government on electronic cigarettes and vaping clearly in recent years.2,3 In our April 2017 submission on Bill S-5 to the Senate Standing Committee on Social Affairs, Science and Technology we recommended that the restrictions on promotion of vaping products and devices should be the same as those for tobacco products.2 We also argued that the government should take the same approach to plain and standardized packaging regulations for e-cigarettes as has now been implemented for tobacco products.2
In our most recent brief we addressed the two main issues outlined in the government’s Notice of Intent with respect to the advertising of vaping products: the placement of that advertising and the use of health warnings.3,4 We expressed concerns that the proposed regulations leave too wide an opening for vaping manufacturers to promote their products, especially to youth. Further, we reiterated our position that health warnings for vaping should be like those being considered for tobacco packages.
This brief will address the issues of greatest concern to the CMA with respect to vaping and youth. This includes marketing, flavours, nicotine levels, and reducing vaping and e-cigarette use among youths.
The Council of Chief Medical Officers of Health have expressed alarm at the rising number of Canadian youths who are vaping, finding this trend “very troubling.”5 The Canadian Medical Association concurs with this assessment and appeals to the federal government to move urgently on this important public health issue.
As our knowledge about the risks of using e-cigarettes increases, there is an even greater imperative to dissuade youth from taking up the habit. This is important because those youth “who believe that e-cigarettes are not harmful or are less harmful than cigarettes are more likely to use e-cigarettes than youth with more negative views of e-cigarettes.”6
The e-cigarette marketplace is evolving quickly as new products emerge. The industry has made clever use of social media channels to promote their wares by taking advantage of the belief that they are a safer alternative to cigarettes.7 They have also promoted “innovative flavoring and highlighted the public performance of vaping.”7 It is no surprise that the United States Food and Drug Administration (FDA) has referred to youth vaping as an “epidemic,” calling it “one of the biggest public health challenges currently facing the FDA.”8 As the US National Academies of Sciences, Engineering, and Medicine has noted “young people who begin with e-cigarettes are more likely to transition to combustible cigarette use and become smokers who are at risk to suffer the known health burdens of combustible tobacco cigarettes.”9
However, some of the efforts employed to convince youth to take up vaping are especially troublesome. As the
US Centers for Disease Control and Prevention (CDC) reported, “one in 5 (US) high school students and 1 in 20 middle school students reported using e-cigarettes in the past 30 days in 2018,” a significant rise in the number of high school students between 2011 and 2018.10 The use of social media campaigns employing “influencers” to capture more of the youth and young adult market or influence their choices shows the need to be especially vigilant.11 In an attempt to counter this influence, a group of over 100 public health and anti-tobacco organizations from 48 countries “are calling on Facebook, Instagram, Twitter and Snap to take “swift action” to curb advertising of tobacco products on their platforms.”12
As much as the industry is making major efforts to attract or sway customers through advertising, youth themselves may hold the key to countering that pressure. A recent US study found that “adolescents generally had somewhat negative opinions of other adolescents who use e-cigarettes. Building on adolescents’ negativity toward adolescent e-cigarette users may be a productive direction for prevention efforts, and clinicians can play an important role by keeping apprised of the products their adolescent patients are using and providing information on health effects to support negative opinions or dissuade formation of more positive ones.”13 Health Canada can play a major role in encouraging and facilitating peer-to-peer discussions on the risks associated with vaping and help to offset the social media influencers.14
We reiterate the concerns we expressed in our recent brief on the potential measures to reduce advertising of vaping products and to help diminish their appeal to youth. The CMA noted that the sections most problematic to the Association were those encompassing public places, broadcast media, and the publications areas.3 Vaping advertisements should not be permitted at all in any of these spaces, with no exceptions.3 These areas need to be addressed on an urgent basis.
As of 2013, over 7,000 flavours had been marketed in the US.15 The data indicated that “about 85% of youth who used e-cigarettes in the past 30 days adopted non-tobacco flavors such as fruit, candy, and dessert.”15 Flavours are helpful in attracting youth, especially when coupled with assertions of lower harm.13 And they have been successful in doing so, as evidenced by the rise in the rates of vaping among youth.8, 16
The addition of a wide variety of flavours available in the pods makes them taste more palatable and less like smoking tobacco.16,17,18 The concern is that e-cigarettes “may further entice youth to experiment with e-cigarettes and boost e-cigarettes’ influence on increased cigarette smoking susceptibility among youth.”15 More worrisome, flavoured e-cigarettes “are recruiting females and those with low smoking-risk profile to experiment with conventional cigarettes.”19
Limiting the availability of “child-friendly flavors” should be considered to reduce the attraction of vaping to youth.19 In a recent announcement, the US FDA has proposed to tighten e-cigarette sales and “remove from the market many of the fruity flavors …blamed on fueling “epidemic” levels of teen use.”20 As we have noted in previous submissions, the CMA would prefer to see flavours banned to reduce the attractiveness of vaping to youth as much as possible, a sentiment shared by other expert groups. 2,3,21
One of the most popular devices to vape with is JUUL™, entering the US market in 2015.22 JUUL’s™ nicotine pods contain 5% nicotine salt solution consisting of 59 mg/mL in 0.7 mL pods.17 Some of JUUL’s™ competition have pods containing even higher levels (6% and 7%).17
The CMA is very concerned about the rising levels of nicotine available through the vaping process, especially by the newer delivery systems. They supply “high levels of nicotine with few of the deterrents that are inherent in other tobacco products. Traditional e-cigarette products use solutions with free-base nicotine formulations in which stronger nicotine concentrations can cause aversive user experiences.”23
Nicotine, among other issues, “affects the developing brain by increasing the risk of addiction, mood disorders, lowered impulse control, and cognitive impairment.15,24 In addition to flavours, and to ease delivery and to make the taste more pleasant, nicotine salts are added to make the e-liquid “less harsh and less bitter” and “more
palatable despite higher nicotine levels.”17
Addressing the Rise in Youth Vaping
There are many factors that lead youth to experiment with vaping and e-cigarettes. For some it is simple curiosity, for others it is the availability of different flavours while still others perceive vaping as “cool,” especially when they can use the vapour to perform “smoke tricks.”25 The pod devices themselves (e.g., JUUL™) help enhance the allure because of the “unique aesthetic appeal of pod devices, ability to deliver nicotine at high concentrations and the convenience of using them quickly and discreetly.”26
As vaping continues to grow in popularity, it will not be easy to curb youths’ enthusiasm for it. However, it is too important of a public health issue to not intervene More research is needed into how youth perceive vaping and e-cigarettes as they do not hold a universally positive view of the habit.7,13 As well, there is evidence to suggest that many are coming to see vaping as being “uncool” and that there are potential health consequences to continued use.25
In view of the still-evolving evidence of the safety of vaping and e-cigarettes, “strategic and effective health communication campaigns that demystify the product and counteract misconceptions regarding e-cigarette use are needed.”25 Further, “to reduce youth appeal, regulation efforts can include restricting the availability of e-cigarette flavors as well as visible vapors.”25 Another approach to consider is the state of Colorado’s recent creation of “a health advisory recommending that health care providers screen all youth specifically for vaping, in addition to tobacco use, because young people may not necessarily associate tobacco with vaping.”27
1. The CMA calls for all vaping advertising to be strictly limited. The restrictions on the marketing and promotion of vaping products and devices should be the same as those for tobacco products.
2. The CMA recommends the limitation of number of flavours available to reduce the attractiveness of vaping to youth.
3. Health Canada should work to restrict the level of nicotine available for vaping products to avoid youth becoming addicted.
4. Health Canada must play a major role in encouraging and facilitating peer-to-peer discussions on the risks associated with vaping and help to offset the social media influencers.
5. Health Canada must develop communication campaigns directed at youth, parents and health care providers to demystify vaping and e-cigarettes and that create a link between tobacco and vaping.
1 Government of Canada. Reducing Youth Access and Appeal of Vaping Products - Consultation on Potential Regulatory Measures. Ottawa: Health Canada; 2019. Available: https://www.canada.ca/en/health-canada/programs/consultation-reducing-youth-access-appeal-vaping-products-potential-regulatory-measures.html (accessed 2019 Apr 11).
2 Canadian Medical Association (CMA). CMA’s Recommendations for Bill S-5: An Act to amend the Tobacco Act and the Nonsmokers’ Health Act and to make consequential amendments to other Acts. Ottawa: CMA; 2017 Apr 7. Available: https://policybase.cma.ca/en/permalink/policy13641 (accessed 2019 May 13).
3 Canadian Medical Association (CMA). Health Canada consultation on the impact of vaping products advertising on youth and non-users of tobacco products. Ottawa: CMA; 2019 Mar 22. Available: https://policybase.cma.ca/en/permalink/policy14022 (accessed 2019 May 13).
4 Government of Canada. Notice to Interested Parties – Potential Measures to Reduce the Impact of Vaping Products Advertising on Youth and Non-users of Tobacco Products. Ottawa: Health Canada; 2019. Available:
https://www.canada.ca/en/health-canada/programs/consultation-measures-reduce-impact-vaping-products-advertising-youthnon-users-tobacco-products.html (accessed 2019 Feb 27).
5 Public Health Agency of Canada. Statement from the Council of Chief Medical Officers of Health on the increasing rates of youth vaping in Canada. Health Canada; 2019. Available: https://www.newswire.ca/news-releases/statement-from-the-council-of-chief-medical-officers-of-health-on-the-increasing-rates-of-youth-vaping-in-canada-812817220.html (accessed 2019 May 14).
6 Glantz SA. The Evidence of Electronic Cigarette Risks Is Catching Up with Public Perception. JAMA Network Open 2019;2(3):e191032. doi:10.1001/jamanetworkopen.2019.1032. Available: https://jamanetwork.com/journals/jamanetworkopen/fullarticle/2729460 (accessed 2019 May 14).
7 McCausland K., et al. The Messages Presented in Electronic Cigarette–Related Social Media Promotions and Discussion: Scoping Review. J Med Internet Res 2019;21(2):e11953). Available: https://www.jmir.org/2019/2/e11953/ (accessed 2019 May 14).
8 Food and Drug Administration (FDA). Statement from FDA Commissioner Scott Gottlieb, M.D., on new data demonstrating rising youth use of tobacco products and the agency’s ongoing actions to confront the epidemic of youth e-cigarette use. Silver Spring, MD: FDA; February 11, 2019. Available: https://www.fda.gov/news-events/press-announcements/statement-fda-commissioner-scott-gottlieb-md-new-data-demonstrating-rising-youth-use-tobacco (accessed 2019 May 17).
9 National Academies of Sciences, Engineering, and Medicine. Public health consequences of e-cigarettes. Washington, DC: The National Academies Press; 2018. Available: https://www.nap.edu/catalog/24952/public-health-consequences-of-e-cigarettes (accessed 2019 May 17).
10 Kuehn B. Youth e-Cigarette Use. JAMA. 2019;321(2):138. Available: https://jamanetwork.com/journals/jama/fullarticle/2720740 (accessed 2019 May 14).
11 Kirkum C. Philip Morris suspends social media campaign after Reuters exposes young 'influencers'. New York: Reuters; May 10, 2019. Available: https://www.reuters.com/article/us-philipmorris-ecigs-instagram-exclusiv/exclusive-philip-morris-suspends-social-media-campaign-after-reuters-exposes-young-influencers-idUSKCN1SH02K (accessed 2019 May 13).
12 Kirkham C. Citing Reuters report, health groups push tech firms to police tobacco marketing. New York: Reuters; May 22, 2109. Available: https://www.reuters.com/article/us-philipmorris-ecigs-socialmedia/citing-reuters-report-health-groups-push-tech-firms-to-police-tobacco-marketing-idUSKCN1SS1FX (accessed 2019 May 22).
13 McKelvey K, Popova L, Pepper JK, Brewer NT, Halpern-Felsher. Adolescents have unfavorable opinions of adolescents who use e-cigarettes. PLoS ONE 2018;13(11): e0206352. Available: https://doi.org/10.1371/journal.pone.0206352 (accessed 2019 May 14).
14 Calioa D. Vaping an 'epidemic,' Ottawa high school student says. Ottawa: CBC News; November 27, 2018. Available: https://www.cbc.ca/news/canada/ottawa/vaping-epidemic-ottawa-high-school-student-says-1.4918672 (accessed 2019 May 14).
15 Chen-Sankey JC, Kong G, Choi K. Perceived ease of flavored e-cigarette use and ecigarette use progression among youth never tobacco users. PLoS ONE 2019;14(2): e0212353. Available: https://doi.org/10.1371/journal.pone.0212353 (accessed 2019 May 17).
16 Drazen JM, Morrissey S, Campion EW. The Dangerous Flavors of E-Cigarettes. N Engl J Med 2019; 380:679-680. Available: https://www.nejm.org/doi/pdf/10.1056/NEJMe1900484?articleTools=true (accessed 2019 May 17).
17 Jackler RK, Ramamurthi D. Nicotine arms race: JUUL and the high-nicotine product market Tob Control 2019;0:1–6. Available: https://www.ncbi.nlm.nih.gov/pubmed/30733312 (accessed 2019 May 20).
18 Reichardt EM., Guichon J. Vaping is an urgent threat to public health. Toronto: The Conversation; March 13, 2019. Available: https://theconversation.com/vaping-is-an-urgent-threat-to-public-health-112131 (accessed 2019 May 20).
19 Chen JC. et al. Flavored E-cigarette Use and Cigarette Smoking Susceptibility among Youth. Tob Regul Sci. 2017 January ; 3(1): 68–80. Available: https://www.ncbi.nlm.nih.gov/pubmed/30713989 (accessed 2019 May 20).
20 LaVito A. FDA outlines e-cigarette rules, tightens restrictions on fruity flavors to try to curb teen vaping. New Jersey: CNBC; March 13, 2019 Available: https://www.cnbc.com/2019/03/13/fda-tightens-restrictions-on-flavored-e-cigarettes-to-curb-teen-vaping.html (accessed 2019 Mar 20).
21 Ireland N. Pediatricians call for ban on flavoured vaping products — but Health Canada isn't going there. Toronto: CBC News; November 17, 2018 Available: https://www.cbc.ca/news/health/canadian-pediatricians-flavoured-vaping-second-opinion-1.4910030 (accessed 2019 May 20).
22 Huang J, Duan Z, Kwok J, et al. Vaping versus JUULing: how the extraordinary growth and marketing of JUUL transformed the US retail e-cigarette market. Tobacco Control 2019;28:146-151. Available: https://tobaccocontrol.bmj.com/content/tobaccocontrol/28/2/146.full.pdf (accessed 2019 May 21).
23 Barrington-Trimis JL, Leventhal AM. Adolescents’ Use of “Pod Mod” E-Cigarettes — Urgent Concerns. N Engl J Med 2018; 379:1099-1102. Available: https://www.nejm.org/doi/pdf/10.1056/NEJMp1805758?articleTools=true (accessed 2019 May 20).
24 U.S. Department of Health and Human Services. E-Cigarette Use Among Youth and Young Adults. A Report of the Surgeon General. Atlanta, GA: U.S. Department of Health and Human Services, Centers for Disease Control and Prevention, National Center for Chronic Disease Prevention and Health Promotion, Office on Smoking and Health; 2016. Available: https://e-cigarettes.surgeongeneral.gov/documents/2016_sgr_full_report_non-508.pdf (accessed 2019 May 20).
25 Kong G. et al. Reasons for Electronic Cigarette Experimentation and Discontinuation Among Adolescents and Young Adults. Nicotine & Tobacco Research, 2015 Jul;17(7):847-54. Available: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4674436/pdf/ntu257.pdf (accessed 2019 May 21).
26 Keamy-Minor E, McQuoid J, Ling PM. Young adult perceptions of JUUL and other pod electronic cigarette devices in California: a qualitative study. BMJ Open. 2019;9:e026306. Available: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6500190/pdf/bmjopen-2018-026306.pdf (accessed 2019 May 21).
27 Ghosh TS, Et al. Youth Vaping and Associated Risk Behaviors — A Snapshot of Colorado. N Engl J Med 2019; 380:689-690.Available: https://www.nejm.org/doi/full/10.1056/NEJMc1900830 (accessed 2019 May 21).