etorphine

Etorphine is a semi-synthetic opioid of the morphinan class, developed in the 1960s, with an analgesic potency approximately 1,000–40,000 times that of morphine. It acts as a potent non-selective full agonist at the mu-, delta-, and kappa-opioid receptors and has weak affinity for the nociceptin/orphanin FQ receptor. Its primary use is in veterinary medicine for immobilizing large mammals such as elephants and rhinoceroses due to its extreme potency. In most countries, it is strictly regulated or banned for human use because of its high potential for abuse and risk of fatal respiratory depression[1][2][3]. Etorphine hydrochloride (the salt form) is used under strict controls in veterinary practice. Developed by Reckitt (now part of Reckitt Benckiser).

Brand names

M99 ReckittM-99 ReckittM 99 Reckitt

Other names

etorfina19-propylorvinol