idk, but i can help you if you doo have to piss in a cup. before i took my drug test i drank a lot of water and exercised and pissed a lot. because the cells of weed and tobacco are in fat cells. and before you piss in the cup piss a lil bit outside of it first, then the rest in the cup. but i doubt that theyl even see the drugs in there. and they wont be able to tell if youve been smoking by looking at your throat unless youve been smoking a lot for years and years. so i think youl be ok for your doctors visit.