Edible
Eaten or swallowed. Slow onset and long duration — and disproportionately responsible for cannabis-related emergency visits.
- Onset
- 30–120 minutes
- Duration
- 6–8 hours
Health Canada puts edible onset at 30 minutes to 2 hours, with up to 4 hours to feel full effects. That delay is the mechanism behind most bad edible experiences: someone feels nothing at 45 minutes, takes more, and then receives both doses at once.
The consequence shows up in hospital data. A study in Annals of Internal Medicine found edibles accounted for 10.7% of cannabis-attributable emergency visits between 2014 and 2016 while representing only 0.32% of total cannabis sales — roughly a 33-fold disproportion. Edible-related visits more often involved acute psychiatric symptoms and cardiovascular symptoms.
Health Canada advises looking for products containing 2.5 mg of THC or less. That is a small square of most commercial chocolate bars, not the whole bar.
Advantages
- • Long duration suits overnight or all-day symptoms
- • No respiratory exposure
- • Precise labelled dosing
Trade-offs
- • Delayed onset invites over-consumption
- • Long duration means mistakes last hours
- • Absorption varies with food, metabolism, and individual factors
Cautions
- • Start at 2.5 mg THC or less and wait a full 4 hours before taking any more.
- • Store locked and out of reach — paediatric edible poisonings rise where cannabis is legal.
- • Do not combine with alcohol.
Best suited to
- • Sleep
- • Sustained pain relief
- • People who cannot or will not inhale
Conditions where edible is a suggested format
Sources
- Health Canada. Cannabis: Lower your risks. Modified 2019-06-14.Accessed 2026-08-15.
- Monte AA, Shelton SK, Mills E, et al. Acute Illness Associated With Cannabis Use, by Route of Exposure: An Observational Study. Annals of Internal Medicine. 2019;170(8):531-537.(DOI 10.7326/M18-2809)Accessed 2026-08-15.
- NASEM 2017, Committee Conclusions (summary PDF of all evidence-tier conclusions).Accessed 2026-08-15.