I always tell them exactly what I do, Its your doctor, and he needs to know certain things, because if you lie, he might prescribe a drug that may clash with your personal stash, which is never good, plus they take blood tests alot so they will know anyway.

dont say nothing ul have big bro watchin ya yer doc got all yer deatails
Your doctor isnt allowed to show your shit to other people, just like a shrink, plus, if you just tell him, theres no proof.