1-(2-Phenylethyl)-4-phenyl-4-acetoxypiperidine (PEPAP) is a synthetic analogue of meperidine. It is sold as a "synthetic heroin."

Buprenorphine is a weak partial mu-opioid receptor agonist and a weak kappa-opioid receptor antagonist used for the treatment of severe pain.[A186283,A186292] It is also commonly used as an alternative to [methadone] for the treatment of severe opioid addicti…

Cholecystokinin ( also known as _CCK or CCK-PZ_) is a peptide hormone of the gastrointestinal system which is responsible for stimulating the digestion of fat and protein. Cholecystokinin, previously called _pancreozymin_, is synthesized and secreted by enter…

Diamorphine (heroin) is a narcotic analgesic that may be habit-forming. It is a controlled substance (opium derivative) listed in the U.S. Code of Federal Regulations, Title 21 Parts 329.1, 1308.11 (1987). Sale is forbidden in the United States by Federal sta…

Dimepheptanol is under investigation in clinical trial NCT00218127 (Treatment of Opioid/heroin Dependence: Comparison of Three Medication Dosing Regimens).

Dynorphin is under investigation in clinical trial NCT00000244 (Effects of Dynorphin 1-13 on Heroin Addiction - 1).

Fentanyl, a potent opioid agonist, was developed in the 1950s to fill a need for strong and rapid analgesia.[A179542] Because of these characteristics, fentanyl is commonly used to treat chronic cancer pain or in anesthesia.[Label,L6598,L6601,L6604,L6607,L922…

Methadone is a potent synthetic analgesic that works as a full µ-opioid receptor (MOR) agonist and N-methyl-d-aspartate (NMDA) receptor antagonist. As a full MOR agonist, methadone mimics the natural effects of the body's opioids, endorphins, and enkephalins …

Naloxone is an opioid antagonist medication used to block or reverse the effects of opioid drugs, particularly within the setting of drug overdoses which are rapidly becoming a leading cause of death worldwide.[A234594] More specifically, naloxone has a high …

Derivative of noroxymorphone that is the N-cyclopropylmethyl congener of naloxone. It is a narcotic antagonist that is effective orally, longer lasting and more potent than naloxone, and has been proposed for the treatment of heroin addiction. The FDA has app…