analgesic (ănˌəljēˈzĭk) [key], any of a diverse group of drugs
used to relieve pain. Analgesic drugs include the nonsteroidal
anti-inflammatory drugs (NSAIDs) such as the salicylates,
acetaminophen, narcotic drugs such as morphine, and synthetic
drugs with morphinelike action such as meperidine (Demerol) and
propoxyphene (Darvon). Aspirin and other NSAIDs (e.g., ibuprofen
and naproxen) reduce fever and inflammation as well as relieve
pain. Narcotic analgesics and the morphinelike synthetic drugs
depress the central nervous system and alter the perception of
pain. They are used to alleviate pain not relieved by the
NSAIDs. NSAIDs and other analgesics are also used in
combination, as in Tylenol with codeine and Darvocet (Darvon and
acetaminophen). Recently, patient-controlled analgesic
techniques have been introduced, in which patients have the
option of injecting small quantities of narcotic type analgesics
to control their own pain. Microprocessor-controlled injections
may be made through intravenous catheter