Opiates are naturally occurring alkaloids derived from the opium poppy (Papaver somniferum), including morphine, codeine, and thebaine. They act on the central nervous system to relieve pain and produce sedation or euphoria. The term “opioid” is broader, encompassing both natural opiates and synthetic or semi-synthetic compounds (like oxycodone, fentanyl, and methadone) that act on the same receptors.
Sources: ASAM; ProjectKnow; Gosnold; Recovery Research Institute; HRB