What is Heroin?

Heroin is an opiate derived from morphine, which has been commercially produced in the form of a painkiller. As a central nervous system depressant it slows down brain function and breathing and leads to a drop in body temperature and blood pressure, as well as an irregular heartbeat. Initial effects include pain relief and a rush of pleasurable feelings. Street names include “smack,” “H,” “skag,” and “junk.”