Substance guides
Can you overdose on marijuana?
Published November 26, 2024 · 7 min read · Updated April 2026
Reviewed for accuracy by licensed clinical professionals.
No confirmed fatal THC overdose has been recorded. The lethal dose is estimated at 1,000 times a recreational dose.
Non-fatal overdose is real
Severe anxiety, paranoia, rapid heart rate, nausea, disorientation, and temporary psychosis send thousands to ERs annually.
Edibles are the main risk
30-120 minute onset delay leads to overconsumption. People eat more when effects are not felt, then experience overwhelming effects.
When to seek help
Most episodes resolve in 2-6 hours. Seek medical attention for severe chest pain, total disorientation, cardiac conditions, or if the substance may not actually be marijuana.
Frequently asked questions
Can you die from smoking weed?
No fatal THC overdose has been confirmed. However, severe non-fatal reactions are common with overconsumption.
Can you go to the ER for being too high?
Yes. ERs regularly treat cannabis overconsumption. It is not a waste of resources if in genuine distress.
How long does a bad edible last?
2-6 hours typically, with residual effects lasting 12-24 hours.
Disclaimer: Informational only. Not medical advice. SAMHSA: 1-800-662-4357.