Ketamine is typically detectable in urine for 2–4 days after a single use. In blood, ketamine clears within 24 hours, though its metabolite norketamine is detectable for slightly longer. Hair follicle tests can detect ketamine use for up to 90 days. Ketamine is increasingly included in standard UK drug testing panels.
Estimates only. Individual results vary based on metabolism, body weight, hydration, and frequency of use.