Drinking a crap load of water and working out and it also depends on what drugs if its weed then yeah this should work also cranberry pills and juice

Drinking a lot of water and working out a lot also depends on how much you weigh and how much you smoke if you smoke once in a while then about a week if you smoke a lil to often about a month

Yeah it will be dirty because they are searching for drugs and if its mixed with dirty and clean pee then they'll trace the dirty pee