From cocaine (I dabbled with it off and on for a few years in and after college) it's been five years-
from weed basically three years- though I smoked four times during that period, but not in succession and I basically say it's been three years- and I guess around three years for cigarettes- but I have smoked rarely over that same period- bumming cigarettes (usually when I've been drinking) - I recently bought a vape pen for when I have the urge- because smoking is so gross to me.