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So, we call this approximate calculation as half life. If you have smoked marijuana then the drug will stay for 3 to 30 days. This is normal for the common drugs. But in the case of marijuana, this can be detected even after a month in Urine drug test marijuana.Marijuana will stay in your system for 10 days if you have been smoking occasionally.If it is smoked on regular basis it will be there up to 45 days and if you smoke constant pace then it will be in the system for as long as 90 days. http://clnk.me/1yc0I.o, we call this approximate calculation as half life. If you have smoked marijuana then the drug will stay for 3 to 30 days. This is normal for the common drugs. But in the case of marijuana, this can be detected even after a month in Urine drug test marijuana.
For this reason, when you ask âHow long does marijuana stay in your system?â you have to realize that itâs very unlikely that youâll be able to get a usable answer. The most common period of time is anywhere from 3-30 days, depending on your metabolism and the amount of marijuana that youâve smoked. did weed 4 times last month and currently i did it my 5th time on april 7th or 15 im not sure.... i would like to know how long it would take it to get out of my system because i have to take a physical for my college and i don't want weed to show up in my urine ...and what is the fastest way for it to fully...