A narcotic analgesic C22H28N2O with pharmacological action similar to morphine that is administered especially in the form of its citrate. Fentanyl is a potent synthetic (man-made) narcotic.. Fentanyl stimulates receptors on nerves in the brain to increase the threshold to pain (the amount of discomfort that a person must feel in order to be considered painful) and reduce the perception of pain (the perceived importance of the pain).
trade names of a narcotic analgesic that can be inhaled and that acts on the central nervous system and may become addictive; used as a veterinary anesthetic and with other drugs before, during, and after surgery; also used as a nonlethal gas to incapacitate people in hostage situations; also abused as a recreational drug
Pain killer sometimes used in cancer care. The drug can be given as a patch stuck onto the skin.