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Q&A (from helloocs.ca)

How long will cannabis stay in my system?

This always depends on how much you consume, how you consume it and your genetics, age, personality, gender and other personal biological factors. Effects can take up to 24 hours to fully dissipate, but THC can be detectable in the bloodstream for up to seven days or more, depending on several factors, including frequency of use. There are few reports of secondary intoxication, but it also depends on a number of factors, including dose and ventilation of the space.

Is cannabis addictive?

It can be. Some people are more prone to becoming addicted than others, and studies suggest that using cannabis in youth increases the risk of addiction.Approximately one in 11 adults who ever consumed cannabis will develop an addiction, or a “cannabis-use disorder”. The early onset of use, long-term use and combining cannabis with tobacco increase the potential of addiction and other health risks.

How do I know how much cannabis to consume?

Always start with a very small amount: one inhalation or a very small amount ingested. Wait at least 10 minutes before inhaling again and 30 to 120 minutes before ingesting any more. If ingesting capsules or oil, please follow the directions on the packaging. The effects of cannabis vary from person to person and will also depend on the type of product and method used for consumption, along with other personal factors that can include genetics, existing mental health conditions, current mood, age, personality, gender and whether cannabis has been consumed often enough to develop a tolerance. If you’re new to consuming cannabis or looking for a milder psychoactive effect, choose products with lower THC potency or cannabis products that conatin CBD. If you prefer to avoid any potential for intoxication, opt for 100% CBD products. 

Do all cannabis products make you “high”?

No. Cannabis products containing THC will have an intoxicating effect. However, some cannabis products are exclusively CBD and generally have no intoxicating effects.

Legal Use of Cannabis

  • In Ontario, the legal age for possessing and purchasing cannabis is 19 years or older.
  • You may possess up to 30g of dried cannabis in public
  • OCS is the only legal retailer of recreational cannabis.
  • You can buy up to 30 grams of dried cannabis flower (or its equivalent in cannabis oil) at a time

For more information, visit OCS.ca/learn/whats-legal or see our FAQ section

Why is there a 30 gram limit for public possession of cannabis but no limit in private homes?

30 g was deemed by the federal government to be a reasonable amount of cannabis to carry in public. In a private dwelling, you are free to possess over 30 g, so long as it’s for personal use.


Tips for Responsible Use

Even experienced cannabis consumers will find these tips helpful.

Consuming cannabis responsibly will help you to manage your experience. Keep these four tips in mind when choosing and consuming cannabis.

  • Start with a very small amount, especially if you’re new to cannabis, trying a new product or using a new method of consumption.
  • Consider THC and CBD content in products. New users should opt for mild THC levels or choose products with higher CBD levels to counter some of the effects of THC.
  • Try lower-risk alternatives to combustion inhalation (smoking).             
  • Consume a very small amount when ingesting cannabis and wait at least an hour to gauge effects. A small amount can produce an intense effect.

For more information on how to reduce the risks associated with cannabis use, visit CAMH.ca for Lower Risk Cannabis Use Guidelines. 

Health and Safety Tips

Consider these important facts about your health when deciding whether to consume cannabis.

  • Avoid cannabis before the age of 25 as it may affect brain development.
  • Never drive after or while consuming cannabis. Cannabis products containing THC will produce impairment in motor skills, cognition and decision-making abilities.
  • Avoid consuming cannabis if you’re pregnant or breastfeeding.
  • Avoid cannabis if you’re at risk for mental health issues, such as having a family or personal history of psychosis or substance misuse.
  • Avoid mixing cannabis and alcohol, as it increases impairment.
  • Avoid mixing cannabis with tobacco, as it increases the health risks and the likelihood of dependency.
  • Keep cannabis safely out of the reach of children and pets.
  • Do not smoke cannabis with a child in the home. Second-hand smoke is a health risk.
  • Holding cannabis smoke in your lungs during inhalation may increase the health risks.
  • Any cannabis bought outside OCS.ca may not be safe for use.