What are opiates?

Opium derivatives: Heroin, Morphine, Codeine Synthetic opioids: Fentanyl Opioid receptors: mu, kappa, delta Opioid drugs: µ agonists Heroin (diacetylmorphine): - more potent and more lipid soluble than morphine - crossing the blood–brain barrier more rapidly - more rapid onset of subjective effects