The term opiate (/nɑːrˈkÉ’tɪk/, from antiquated Greek ναρκῶ narkō, "to make numb") initially alluded medicinally to any psychoactive compound with rest instigating properties. In the United States, it has since moved toward becoming related with sedatives and narcotics, generally morphine and heroin, just as subsidiaries of a significant number of the mixes found inside crude opium latex. The essential three are morphine, codeine, and thebaine (while thebaine itself is without a doubt, all around somewhat psychoactive, it is a urgent antecedent in by far most of semi-manufactured narcotics, for example, oxycodone).

Legitimately, the expression "opiate" is loosely characterized and regularly has negative implications. At the point when utilized in a lawful setting in the U.S., an opiate medicate is one that is completely denied, for example, heroin, or one that is utilized infringing upon administrative guideline.

In the restorative network, the term is all the more absolutely characterized and by and large does not convey similar negative undertones.

Statutory arrangement of a medication as an opiate regularly builds the punishments for infringement of medication control rules. For instance, albeit government law arranges both cocaine and amphetamines as "Timetable II" tranquilizes, the punishment for ownership of cocaine is more noteworthy than the punishment for ownership of amphetamines since cocaine, in contrast to amphetamines, is delegated an opiate.