If you smoked 4 joints in one day how long would it stay in your system?

I don't think the THC would be out of your system in two days.

no it takes a min.of 30 days.and if they take a hair sample it can show up to 3 years.

I am 5 '7 and 135 lbs. I am not a regular smoker, but I hit the joint 3 good times on Friday night and again 3x on Saturday night. I waited until Wednesday about 2 pm and gave myself a drug test, and it was clean. I never ever drink water, so that had nothing to do with it. Hope this helps!