it takes about 7 days for shrooms to be untraceable in a drug test. About twelve hours. I am assuming you are asking about psychadelics, and most drug tests are ill-equipped to detect them anyway. Not to worry. 1 to 3 days on a urine test several weeks on a serious test. Not usally part of drug screens
Like any drug, you build up a tolerance. With hallucinogens, tolerances are particularly effective for a few days after a trip so it's best to usually just wait about a week to really be sure you'll trip as hard as you can.
If, however, you have a ton of mushrooms and want to go on a weekend-long (or even week-long?) binge, you can. But the second and third (fourth, fifth, etc.) days will require vastly more mushrooms than the first day.
Another opinion
While I appreciate the attitude of the above answer, I think the person asking the question was more concerned with the long-term dangers of regular usage over months or years.
Here is a quote from shroomery.org:
"There are no long term physical effects from ingestion of mushrooms containing psilocybin and psilocin. As far as long term mental effects go this is a subject for debate and has no clear cut answer based on the little bit of research and clinical studies that have been done"
There is anecdotal evidence for users becoming less in touch with everyday reality after long-term usage of any hallucinogenic - becoming more eccentric or "out there" and less "on it" than non-users, but this could be to do with the confounding factor of multiple drug use.
about 7 days but it will still be in your hair for a long time They'll last roughly around 4-8 hours, depending on the dose
About an hour but you will feel the peek at like 3 hours
1 to 3 days. not detectable on drug tests
2 days
forever
Get mushrooms, Tell police, Find out?
48 hours
There is no penicillin in magic mushrooms.
Magic mushrooms are grown.
Magic mushrooms come in only 2 real species, neither of which are "lepta" mushrooms.
Magic mushrooms do not exist they are only a myth or a legend. The mushrooms you think you might be picking are toad stools and they are dangerous and can badly harm you so stay clear. There are also types of eating mushrooms like field ones you might have for your breakfast or dinner.
Magic mushrooms are poisonous and that is why you're tripping...
no
Magic mushrooms are neither a stimulant or depressant. They are a hallucinogen.
high temperatures destroy the good stuff in magic mushrooms. You can find more out at magic-mushrooms.net
I act fine on magic mushrooms. You, on the other hand, act like an @sshole.
No. Magic mushrooms are illegal everywhere in the United States.