How long does cannabis last?
When smoked, cannabis effects start within 5–10 minutes and last 2–4 hours. Edibles (space cakes, gummies) kick in after 30–120 minutes and last 4–8 hours. Vaporisation sits in between: 5–15 minutes onset, 2–5 hours duration.
Key facts
- Smoking: 5–10 min, 2–4 h
- Vape: 5–15 min, 2–5 h
- Edibles: 30–120 min, 4–8 h
- Residual up to 24 h
- Edibles stronger (11-OH-THC)
Detailed answer
Duration depends on the route: smoking/vaping → THC via the lungs, fast strong effect. Edibles → THC through the gut, converted in the liver to 11-OH-THC, more psychoactive than THC itself. Onset is later, effect more intense and longer. Rule: start small (5–10 mg THC), wait 2 h, do not redose. Residual effects (tiredness, focus) 6–24 h.