Substances - Meth: How Long Does It Stay in Your System?
Methamphetamine has a longer half-life than most stimulants, remaining detectable in urine for 3-5 days after a single use and up to a week or more with regular use.
Meth Half-Life and Metabolism
Methamphetamine has a half-life of approximately 10-12 hours, meaning it takes much longer to clear the body than cocaine (1-hour half-life). About 54% of meth is excreted unchanged in urine. It is partially converted to amphetamine, which is also detected in drug tests. A standard urine drug test for amphetamines will detect methamphetamine.
Detection Windows
| Test Type | Occasional Use | Heavy Use |
|---|---|---|
| Urine | 3-5 days | Up to 7 days |
| Blood | 1-3 days | Up to 3 days |
| Saliva | 1-4 days | Up to 4 days |
| Hair | Up to 90 days | 90+ days |
Getting Help in New Jersey
If you or someone you know is struggling with meth use, Archangel Centers provides confidential assessment and treatment in Tinton Falls, NJ. Call (732) 889-5400 or use our online insurance verification form. Our admissions team is available 24/7.