I dont understand, perhaps you dont mean EVERYTHING that can harm you in any way shape or form. By this definition, alcohol would be included. It kills brain cells, damages the liver and so on and so forth. How about any pharmaceuticals (I spell that right?)? Everything you buy has side-effects only some are more severe than others? How about radiation therapy?
I dont mean to sound cynical or anything, but perhaps you could clarify? Perhaps any “drug” used specifically for its effects then? This would “allow” alcohol (everyone drank in the Bible) but not for the sole purpose of getting wasted. But then tobacco and marijuana could be argued for in the same fashion…drnit
BTW:I dont smoke anything and the worst thing I drink is Red Bull.