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…

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 …

Morphine, the main alkaloid of opium, was first obtained from poppy seeds in 1805.[A176035] It is a potent analgesic, though its use is limited due to tolerance, withdrawal, and the risk of abuse.[A176050] Morphine is still routinely used today, though there …

NRP369 is an oxycodone derivative under investigation for the treatment of pain (moderate to moderately severe). NRP369 was developed by New River Pharmaceuticals as a backup therapeutic to [NRP290].

Oxycodone is a semisynthetic opioid analgesic derived from thebaine in Germany in 1917.[A178696] It is currently indicated as an immediate release product for moderate to severe pain and as an extended release product for chronic moderate to severe pain requi…

PTI-801 represents a new class of drugs to treat pain. PTI-801 can minimize the opioid tolerance, dependence or addiction that is often associated with repeat use of oxycodone. It is a combination of oxycodone with ultralow-dose naltrexone, an opioid antagoni…