Analgesic studies with nefopam hydrochloride

Nefopam hydrochloride[3] is a novel analgesic agent possessing an activity profile distinct from that of narcotic, narcotic agonist-antagonist and analgesic antiinflammatory agents. Analgesic activity is demonstrated in a variety of laboratory procedures with rodents, cats and monkeys. The analgesic potency of nefopam hydrochloride is generally similar to that of codeine phosphate. The compound lacks potential for tolerance development and does not exhibit cross-tolerance with morphine sulfate.