What are opioids?

Answer:
OPIOIDS:

-noun Biochemistry, Pharmacology. 1. any opium like substance. 2. any of a group of natural substances, as the endorphins, produced by the body in increased amounts in response to stress and pain. 3. any of several synthetic compounds, as methadone, having effects similar to natural opium alkaloids and their derivatives. (from dictionary.com)
First answer by Michael Kurkov. Last edit by Michael Kurkov. Contributor trust: 6 [recommend contributor recommended]. Question popularity: 2 [recommend question].