Anyone reading about psilocybin soon asks how long the experience will take and how long the substance stays in the body. This guide answers the question "how long does psilocybin last?" using data from clinical studies. It covers onset, peak and duration, the psilocybin half-life and how the body breaks it down, and what affects the timeline.
This article is for general information only. It does not encourage drug use, and psilocybin is illegal in many countries.
How Long Does Psilocybin Last? The Short Answer
For most people, the effects of psilocybin last about four to seven hours. In a 2022 study at University Hospital Basel, healthy volunteers took fixed doses of 15, 25 or 30 mg of psilocybin [1]. On average, the effects lasted about 5.5 hours at the lower doses and about 6.4 hours at the highest dose. However, the range was wide, and some people felt effects for noticeably longer.
The Psilocybin Timeline Step by Step
Onset: 20 to 60 minutes
After swallowing psilocybin, the body converts it into psilocin, the active form. First effects usually appear within 20 to 60 minutes. An empty stomach often means a faster onset, while a full meal may delay it.
Peak: about 2 hours
In the Basel study, psilocin levels in the blood peaked after an average of about two hours [1]. This is usually when the effects are strongest.
Comedown: 2 to 3 hours
Next, the effects slowly fade over the following hours. Many people feel tired but clear-headed afterward, while some notice subtle aftereffects into the evening. These can include changes to sleep, which our article on psilocybin and sleep covers.
How Long Psilocybin Lasts in the Body
Psilocin is cleared from the blood fairly quickly. In the Basel study, the psilocin half-life, the time it takes for levels to fall by half, was about 1.4 to 1.8 hours [1]. An earlier American study estimated a half-life of around three hours [2]. In addition, the liver changes most psilocin into an inactive form, and only a small part leaves the body unchanged in urine [2]. As a result, the body removes most psilocin within about a day. Our article on whether psilocybin shows up on a drug test explains what this means for detection.
What Changes How Long Psilocybin Lasts?
- Dose: higher doses usually last longer and feel more intense [1]. Our magic mushroom dosage guide explains dose ranges.
- Form: mushroom tea or lemon preparations may start faster, but they do not always end sooner.
- Medications: some medicines can weaken or strengthen the effects. Read our guide to psilocybin and antidepressants for details.
- Body weight: interestingly, the Basel study found that body weight did not influence how psilocybin was processed or how strongly people responded [1].
How Long Psilocybin Lasts vs Other Psychedelics
Compared with other psychedelics, psilocybin has a medium duration. An LSD experience often lasts eight to twelve hours or more, while some other substances last much shorter. Our comparison of psilocybin vs LSD explains these differences in more detail.
Practical Safety Points
Because effects can last six hours or longer, it helps to plan the whole day. Do not drive or operate machinery during the experience or until you feel fully normal again, which for many people means waiting until the next day. Moreover, do not take a second dose if the first one seems slow to start, since this can lead to an overwhelming experience. Our guides to set and setting and psilocybin tolerance cover related safety topics.
Frequently Asked Questions
How long does a psilocybin trip last?
Usually about four to seven hours, with the peak at around two hours. Higher doses tend to last longer.
How long does psilocybin stay in your body?
The psilocybin half-life is short, so psilocin levels fall quickly, and the body clears most of it within about a day. The exact timing depends on the dose and the person.
Why do magic truffles feel similar in duration?
Magic truffles contain the same active compounds, so their timeline is similar.
Conclusion: Plan for the Full Psilocybin Timeline
So, how long does psilocybin last? In clinical studies, the effects lasted around five to six and a half hours on average, with a peak at about two hours. The body then clears psilocin within roughly a day. Knowing this timeline helps people plan safely and avoid risky choices such as redosing too early. Learn more in our guide to psilocybin effects.
Sources
- Holze F, et al. Pharmacokinetics and pharmacodynamics of oral psilocybin administration in healthy participants. Clinical Pharmacology & Therapeutics. 2022. doi:10.1002/cpt.2821
- Brown RT, et al. Pharmacokinetics of escalating doses of oral psilocybin in healthy adults. Clinical Pharmacokinetics. 2017. doi:10.1007/s40262-017-0540-6
