A potent narcotic analgesic, abuse of which leads to habituation or addiction. It is primarily a mu-opioid agonist. Fentanyl is also used as an adjunct to general anesthetics, and as an anesthetic for induction and maintenance. (From Martindale, The Extra Pharmacopoeia, 30th ed, p1078)

Synonyms: R 4263, Durogesic, Fentanest, Phentanyl, Fentanyl Citrate, Fentanyl, R-4263, Fentora, 0, Duragesic, MUN5LYG46H, R4263, Propanamide, N-phenyl-N-(1-(2-phenylethyl)-4-piperidinyl)-, Transmucosal Oral Fentanyl Citrate, Sublimaze, UF599785JZ