How long does ketamine stay in your system?

Worried: Why are there so many questions like this on health tap? This is a controlled anesthesia drug! very dangerous in untrained hands. Sedation in normal doses last 1-2 hours. In your system much longer.

Depends on dose: Ketamine's drug level drops by 1/2 about every 2-2 1/2 hours. This is known as the half-life of the drug. At about 5 half-lives, the effect of a drug is usually considered insignificant. So at about 10-12 hours, the effects of ketamine from a typical dose is probably minimal. To some extent though, this is dose dependent. Large doses take longer to clear, small quicker.