Quick answer
Meth is usually detectable in urine for about 1–3 days after occasional use and 2–5 days after heavy use. Blood and saliva tests detect it for about 1–2 days, and hair tests for up to about 90 days.
How long will it show up on a drug test?
Pick a substance, test type and how often it was used. Estimates are based on published research.
1 Substance
2 Type of test
3 How often
Usually detectable in urine · Meth · once or occasionally
About 1–3 days
- What the test looks for
- Methamphetamine and its metabolite amphetamine
- On standard drug tests?
- Yes — on standard 5-panel, 10-panel and federal workplace tests (amphetamines, 500 ng/mL screening cutoff).
- How fast it clears
- About 10 hours on average, with wide variation between people (the FDA label lists 4–5 hours).
Estimates, not a guarantee. Dose, how often and how long someone has used, body fat, hydration, metabolism and the lab’s cutoff all change the window. No calculator can tell you how a specific test will come out.
Worried about your use or someone else’s? Talk to someone 24/7: ☎ (833) 589-6933 Who answers?
How long does meth stay in your urine?
Urine tests look for methamphetamine and amphetamine, which the body makes from meth.
| Test | Once or occasionally | Heavy or long-term use |
|---|---|---|
| Urine | About 1–3 days | About 2–5 days |
| Blood | Up to about 1–2 days | Up to about 2–3 days |
| Saliva | Up to about 1–2 days | Up to about 2 days |
| Hair | Up to about 90 days | Up to about 90 days |
A single dose is usually detectable for about a day or two. Heavy, repeated use keeps meth in the body longer, typically 2–5 days. Lower lab cutoffs can extend these windows by more than a day.
Meth half-life
Methamphetamine has an average half-life of about 10 hours, with wide variation from person to person. The FDA label for prescription methamphetamine lists 4–5 hours. Because it takes about five half-lives for a drug to clear, meth typically leaves the body within a few days.
How long does meth stay in your blood, saliva and hair?
Meth is generally found in blood and saliva for up to about 1–2 days, a little longer after heavy use. Hair tests can detect meth use over about the past 90 days.
Does meth show up on a standard drug test?
Yes. Meth is detected by the amphetamine part of standard 5-panel, 10-panel and federal workplace tests. Some cold medicines and other drugs can trigger a positive amphetamine screen, so positive screens are confirmed with a more precise test. Federal rules also require amphetamine to be present for a meth result to count as positive.
What affects how long meth stays in your system?
- How much and how often. A single use clears far faster than daily or heavy use, which can build up in the body.
- The test and its cutoff. Every test has a cutoff level. Labs using lower cutoffs or more sensitive methods (like LC-MS/MS) can detect use for longer.
- Metabolism, age and health. Liver and kidney function, age, genetics and other medications change how fast a drug is broken down.
- Body fat and hydration. Fat-soluble drugs linger longer in people with more body fat. Diluted urine can lower concentrations, and labs check for dilution.
- Urine pH. Alkaline urine slows how fast meth is cleared and can lengthen the detection window; acidic urine speeds it up.
When a drug test is the least of your worries
If you are looking this up because you are worried about an upcoming test, it may be worth asking a bigger question: is your use starting to cost you something, such as your job, your health, money or relationships? Needing to plan around a drug test is itself a sign some people use to decide it is time for help.
Treatment is more flexible than most people expect. Outpatient programs let you keep working, and many plans cover rehab under federal parity rules. You can get matched with up to 3 programs in about a minute, browse rehab centers by state, or call the number on this page to talk it through. It is free and confidential.
Detection times for other substances
See every substance side by side on our drug detection times chart.
Frequently asked questions
How long does meth stay in your urine?
Usually about 1–3 days after occasional use and about 2–5 days after heavy or repeated use.
What is the half-life of meth?
About 10 hours on average, with wide variation between people. The FDA label for prescription methamphetamine lists 4–5 hours.
Does meth show up as amphetamine on a drug test?
Yes. Standard tests screen for amphetamines, which includes meth. The body also turns some meth into amphetamine, and confirmation tests measure both.
How long does meth stay in hair?
Hair tests can detect meth use over about the past 90 days, starting roughly a week after use.
How is meth addiction treated?
Treatment usually combines behavioral therapy such as contingency management with medical and psychiatric care, often in residential or intensive outpatient programs. See our meth addiction treatment guide.
Sources
- SAMHSA. TAP 32: Clinical Drug Testing in Primary Care (2012)
- Moeller KE et al. Clinical Interpretation of Urine Drug Tests. Mayo Clinic Proceedings (2017)
- SAMHSA. TIP 63: Medications for Opioid Use Disorder (2021)
- Hadland SE, Levy S. Objective Testing: Urine and Other Drug Tests. Child Adolesc Psychiatr Clin N Am (2016)
- Cruickshank CC, Dyer KR. A review of the clinical pharmacology of methamphetamine. Addiction (2009)
- FDA label: Methamphetamine hydrochloride tablets. DailyMed
- HHS/SAMHSA. Mandatory Guidelines for Federal Workplace Drug Testing Programs: Authorized Testing Panels. Federal Register (Jan 2025)
