Imagine that you are taking a puff of a cigarette, a slug of whiskey, a snort of cocaine, a shot of heroin, a toke of marijuana. Put aside first whether the drugs are legal or not. For now, just concentrate on the chemistry. The moment you take that puff, that slug, that snort, that shot, that toke, trillions of potent molecules rush through your bloodstream before finally reaching your brain.
Once they settle there, these molecules will set off a cascade of electrical and chemical events, a type of neurological chain reaction that will ricochet around your skull and rearrange your mind’s interior reality. And before you know it, you are addicted.
