> Heroin, taken in correct dosage

by what ROA ? You smoke it, and you're good until your dependence increases. Then you must smoke it to feel normal. But if you slam it, you'll get high again. Do that a while and your dependence increases just as before, now you have to slam it just to feel normal. But if you just got someone to give you their dose, then you could slam 2 doses and get high again...and now you're in overdose territory