Why should people avoid combining risk factors, such as starting young and using high-THC products often?
CannSell: Lower-risk use guidelines
Canada's Lower-Risk Cannabis Use Guidelines: delaying use, lower-THC products, avoiding synthetics and smoking, occasional use, six hours before driving and who should not use, plus the store's duty to share responsible-use information.
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Study reference: Ontario cannabis retail law and AGCO guidance (Oct 2026), Ch. 6 Lower-risk use — Canada's Lower-Risk Cannabis Use Guidelines (2019); Registrar's Standard 7.1
All 13 questions in this test
Every question and its answer choices. The correct answers and explanations appear when you take the test above.
Why should people avoid combining risk factors, such as starting young and using high-THC products often?
- Combined risk behaviours magnify the chance of harm
- Combining risks matters only for medical cannabis users
- Only one risk factor can apply to a person at once
- Combined risks cancel each other out over time
How long do the guidelines say to wait before driving after using cannabis?
- At least 1 hour
- At least 6 hours
- At least 2 hours
- At least 30 minutes
Roughly what share of people who use cannabis are estimated to develop cannabis use disorder?
- Between 10 and 30 per cent
- More than 75 per cent
- Less than 1 per cent
- About 50 per cent
According to Canada's Lower-Risk Cannabis Use Guidelines, what is the most effective way to avoid cannabis risks?
- Using only with friends
- Using only on weekends
- Using only edible products
- Not using cannabis at all
Who do the guidelines say should not use cannabis at all?
- Anyone over the age of 50, whatever their health history
- Anyone using cannabis for the first time in a social setting
- People who drink alcohol occasionally with meals or at events
- Pregnant women and people with a family history of psychosis
What responsible-use document must every Ontario cannabis store make available to customers?
- The store's annual sales and profit report
- Health Canada's Consumer Information – Cannabis
- The AGCO's schedule of monetary penalties
- A list of all licensed producers in Canada
If someone does smoke cannabis, which practice should they avoid?
- Using a lighter instead of a match
- Smoking a smaller amount than usual
- Deep inhalation and holding their breath
- Smoking outdoors in a private yard
How much higher is the collision risk for cannabis-impaired drivers, according to the guidelines?
- Exactly twice as high for everyone
- Two to three times higher
- No higher at all
- About ten per cent higher
What do the guidelines say about synthetic cannabis products such as K2 and Spice?
- They are recommended for first-time users who are nervous
- Avoid them; their effects are more severe
- They are legal and sold only by the Ontario Cannabis Store
- They are safer because they contain no real THC
What frequency of use do the guidelines recommend limiting to?
- Small amounts spread over every day of the week
- Any frequency, as long as the product is legal
- Once in the morning and once again at night
- Occasional use, such as one day a week or less
Which method do the guidelines describe as likely the most harmful way to use cannabis?
- Eating a labelled edible with a known THC dose
- Applying a cannabis topical lotion to the skin
- Smoking burnt cannabis, especially mixed with tobacco
- Using a dry-herb vaporizer device at home
Which product choice lowers risk under the guidelines?
- Synthetic cannabinoids such as K2
- Low THC with a high CBD-to-THC ratio
- Concentrates rather than dried flower
- High THC with little or no CBD
Before roughly what age does starting cannabis use most raise the risk of harm?
- 16
- 21
- 25
- 30
Lower-risk use guidelines: key rules to remember
Our summary of what the official handbook says on this topic, in our own words. Read it before or after the practice questions above, then check the original chapter. Read the official chapter ↗
Canada's Lower-Risk Cannabis Use Guidelines (LRCUG, PHAC/CAMH 2019)
- The LRCUG give 10 science-based recommendations to help people who choose to use cannabis reduce health risks; they mainly apply to non-medical use.
- The most effective way to avoid the risks of cannabis is not to use it.
- Delay use at least until after adolescence; starting before about age 16 raises the risk of mental health, education, injury and other substance problems; the brain keeps developing until the mid-20s.
- Choose products with low THC and a high CBD-to-THC ratio; higher THC potency is linked to more acute and long-term problems.
- Avoid synthetic cannabinoids (e.g. K2, Spice), which have more severe effects and have caused deaths.
- Smoking burnt cannabis, especially mixed with tobacco, is likely the most harmful method; vaporizers and edibles avoid smoke but are not risk-free.
- Edibles avoid lung risks but delay onset and can lead to higher doses.
- If smoking, avoid deep inhalation, breath-holding and forceful exhalation, which increase intake of toxins.
- Avoid frequent or intensive use; limit use to occasional use, such as one day a week, weekends only, or less.
- Do not drive or operate machinery for at least 6 hours after using cannabis; the collision risk is 2 to 3 times higher when cannabis-impaired, and higher still when combined with alcohol.
- People with a personal or family history of psychosis or substance use disorders, and pregnant women, should not use cannabis at all.
- Avoid combining risk factors (e.g. early start plus frequent use of high-potency products), which multiplies harm.
- About 10 to 30 per cent of people who use cannabis are estimated to develop cannabis use disorder.
Responsible use information
- Licensees must make information on responsible cannabis use available to patrons.
- At minimum, the store must make Health Canada's "Consumer Information – Cannabis" document available to customers.
Are there safer ways to use cannabis?
- Try not to use cannabis alone, in case of a bad reaction.
- Know how much THC a product contains before using it, and store it safely.
- Vaping is less harmful to the lungs than smoking, and edibles do not harm the lungs, but all products carry other risks.
- Avoid cannabis while pregnant or breastfeeding.
Other topics
- Training and certificationWho must complete AGCO Board-approved cannabis retail training before the first shift, the two approved programs, the 80% final-exam standard, background checks and training records.
- Licences, managers and store locationsRetail operator licence, store authorization and retail manager licence, what managers do, age 19 for applicants, the five-store limit, the 150-metre school rule, public notice and municipal opt-outs.
- Legal age and checking IDAge 19 in Ontario, ID checks at the door for anyone who appears under 25, the good-faith ID defence, fake ID, proxy purchases, no staff under 19 and youth offences.
- Products, sources and purchase limitsBuying only from the OCS, what else a store may sell, the 30-gram limit per visit or order, federal equivalency amounts, THC limits for edibles and extracts and packaging rules.
- Cannabis and its effectsTHC and CBD, onset and duration for inhaled and ingested cannabis, short- and long-term effects, overconsumption and poisoning, pregnancy, mixing with alcohol and safe storage.
- Intoxication and refusing a saleThe ban on selling to anyone who is or appears intoxicated, signs of cannabis impairment, overconsumption, proxy buying, compliance records and police powers on premises.
- Running the storeHours of 7 a.m. to 11 p.m., the cannabis retail seal, posting the authorization, enclosed retail space, surveillance, secure storage, sensory displays and the ban on self-service and vending machines.
- Delivery, curbside and online salesWho may deliver, delivery hours of 9 a.m. to 11 p.m., residences and private places only, ID at the door, returning undelivered orders, curbside pick-up rules and First Nations delivery restrictions.
- Advertising, promotion and inducementsWhat store advertising may not do, federal promotion limits, no free product or contests to drive sales, and the rules on inducements from licensed producers.
- Records, inventory and destructionThree-year records, monthly inventory counts, certified point-of-sale systems, destroying unsellable cannabis on camera, recalls, inter-store transfers and preventing diversion.
- Inspections, offences and penaltiesAGCO inspections and inspectors' powers, whistle-blower protection, fines under the Cannabis Licence Act and Cannabis Control Act, monetary penalties and Licence Appeal Tribunal hearings.
- Where to use it, transport and drivingWhere adults may and may not smoke or vape cannabis in Ontario, possession and home-growing limits, carrying cannabis in vehicles and boats, and impaired-driving consequences.