Marijuana Overdose Symptoms

Taking more marijuana than your body can comfortably handle produces a recognizable set of symptoms — unpleasant, sometimes frightening, but not life-threatening on their own.

The most common symptoms

Intense anxiety or panic, a racing heart, nausea and vomiting, dizziness, paranoia, and a strong sense of disorientation are all typical. Some people also report chest tightness, sweating, and tremors.

Why edibles cause this more often

Because edibles take 30 minutes to two hours to kick in, it’s easy to take more before feeling the first dose — leading to a much stronger effect than intended once everything hits at once. This delayed-onset pattern is behind most severe “overdose” reactions.

How long symptoms last

Smoked or vaped cannabis symptoms typically ease within a few hours. Edible-related symptoms can last considerably longer — sometimes six to eight hours or more — because of how slowly the body processes ingested THC.

When symptoms point to something else

A single overdose-style reaction is different from a repeating pattern of vomiting tied to chronic heavy use, which points toward Cannabinoid Hyperemesis Syndrome rather than a one-time overdose. Our comparison of CHS and normal nausea can help sort out which pattern fits.

FAQ

Is vomiting from a marijuana overdose dangerous?

It’s uncomfortable but not typically dangerous on its own, though staying hydrated afterward matters, and repeated vomiting should always be evaluated if it doesn’t stop.

Can these symptoms be treated at home?

Mild symptoms often resolve with rest, hydration, and time. More severe symptoms — especially chest pain or vomiting that won’t stop — warrant medical evaluation.

Written by the CHS SOS Team · Last updated: July 2026