probably around 3 to 4 hits. It was low grade swagg if that makes any diffrence. I quit for awhile so I could get a job but slipped those 3 to 4 times but before I shaved my head I was smoking grade A nuggs that I grew myself the swagg I smoked didn't even get me high do you think I should do more to pass this test and how well does that zydott shampoo work do you know?