Edibles vs Inhaled: Why Onset Differs
Why eaten and inhaled cannabis differ in onset and duration, using public-health figures only.
Short answer: inhaled cannabis reaches the bloodstream through the lungs within minutes. Eaten cannabis has to be digested and absorbed first and passes through the liver, so it starts later and lasts longer. Health Canada gives 30 minutes to 2 hours for onset of edibles and up to 12 hours for duration.
Why the two routes differ
Inhaled cannabis reaches the bloodstream through the lungs within minutes. Eaten cannabis has to be digested and absorbed, then passes through the liver, where THC is partly converted to 11-hydroxy-THC before it reaches the brain. That route is slower to start, longer to last and, for many people, stronger per milligram.
What public-health bodies say
| Source | Onset (edibles) | Full effect | Duration |
|---|---|---|---|
| Health Canada | 30 min – 2 h | up to 4 h | up to 12 h |
| US CDC | 30 min – 2 h | — | longer than smoking or vaping |
These are population ranges. Your own timing depends on food in the stomach, body weight and how often you use cannabis.
Why this changes how you take a dose
- Do not judge an edible by how quickly an inhaled dose worked for you.
- Wait a full two hours before deciding to take more.
- Alcohol raises THC levels and impairment; do not combine them.
Common mistakes
- Taking a second portion because nothing has happened yet.
- Assuming the same milligrams feel the same by both routes.
- Planning to drive after "a small amount".
See how long do edibles take to work and taking a second edible dose too soon.
General information, not medical advice. Talk to your own doctor or pharmacist.
Sources
- Health Canada, what you need to know if you choose to consume cannabis, canada.ca.
- US CDC, Cannabis and poisoning, cdc.gov/cannabis/health-effects/poisoning.html.
Last updated .
How we write this: figures come only from named public sources, and where we have no source we write without a number. Published by Insaan LLC as an organisation, with no individual author named; see about this site.
