well i smoked once or twice while i was sick and i don't think it did any harm. it did help me sleep, so i just took a lot of medicine and got a lot of rest. it took me like 3 days, a bottle of tylenol cold medicine, and some nasal decongestants. i'm not sure if i would recommend heavy smoking, but i don't think a bowl in the middle of the day to put me out for a few hours hurt anything. at least not in my case.