Quick answer
Psilocybin from shrooms clears quickly. Psilocin, its active form, has a half-life of about 3 hours and is usually undetectable in urine within about 24 hours. Shrooms are not on standard 5-panel, 10-panel or federal workplace drug tests.
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 · Shrooms · once or occasionally
Usually under 24 hours
Free psilocin usually drops below detectable levels within 24 hours. Specialized lab methods can extend this somewhat.
- What the test looks for
- Psilocin, the active form of psilocybin
- On standard drug tests?
- Not on standard 5-panel, 10-panel or federal workplace tests. It needs a special lab order.
- How fast it clears
- Psilocin has a half-life of about 3 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.
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How long do shrooms stay in your urine?
When you take psilocybin, the body quickly turns it into psilocin, the compound that causes the effects. Psilocin is then mostly passed in urine in a bound form.
| Test | Once or occasionally |
|---|---|
| Urine | Usually under 24 hours |
| Blood | Likely only hours |
| Saliva | Not established |
| Hair | Not established |
In research, free psilocin usually fell below detectable levels in urine within about 24 hours. Specialized lab methods that break down the bound form can detect it a little longer, but there is little research on exact windows, and saliva and hair windows have not been established.
Psilocin half-life
In a study of healthy adults, psilocin had a half-life of about 3 hours, and no intact psilocybin was found in blood or urine. That fast clearance is why shrooms leave the body quickly compared with most drugs.
Do shrooms show up on a drug test?
Not on standard tests. Psilocybin is not part of 5-panel, 10-panel or federal workplace panels, which only include PCP among hallucinogens. Testing for shrooms requires a special lab order, and psilocin is unstable in samples, which makes it harder to detect.
Are shrooms addictive?
Psilocybin is not considered physically addictive, and tolerance builds quickly. The bigger risks are a “bad trip,” panic, dangerous behavior while impaired and, for some people, triggering serious mental health symptoms, especially with a personal or family history of psychosis. Mushrooms bought illegally may also be misidentified or mixed with other drugs.
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 do shrooms stay in your urine?
Usually under about 24 hours. Psilocin clears quickly, and standard tests do not look for it.
Do shrooms show up on a 10-panel drug test?
No. Psilocybin is not on standard 5-panel, 10-panel or federal workplace tests. It requires a special lab test.
How long do the effects of shrooms last?
Effects typically start within an hour and last about 4–6 hours, depending on the dose. Detection in urine lasts only slightly longer.
Is it safe to mix shrooms with other drugs?
Mixing increases risk. Combining psilocybin with alcohol, cannabis or stimulants can make reactions less predictable, and some psychiatric medications interact with it. If someone is in crisis, call 911 or 988.
Sources
- Brown RT et al. Pharmacokinetics of escalating doses of oral psilocybin in healthy adults. Clin Pharmacokinet (2017)
- Hasler F et al. Renal excretion profiles of psilocin following oral psilocybin. J Pharm Biomed Anal (2002)
- HHS/SAMHSA. Mandatory Guidelines for Federal Workplace Drug Testing Programs: Authorized Testing Panels. Federal Register (Jan 2025)
- Chen RJ, Cogburn M. Drug Testing. StatPearls, NCBI Bookshelf
