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  • Title: Controlled clinical trial of oral and parenteral nefopam hydrochloride. A novel and potent analgesic drug.
    Author: Gassel MM, Diamantopoulos E, Petropoulos V, Hughes AC, Ballesteros ML, Ré ON.
    Journal: J Clin Pharmacol; 1976 Jan; 16(1):34-41. PubMed ID: 1107359.
    Abstract:
    The results of a controlled, double-blind clinical trial are reported demonstrating the potency of analgesia produced by orally and parenterally administered nefopam HCl in hospitalized patients with pain principally of skeletal and neuromuscular origin. The drug is an analogue of orphenadrine, consisting of a cyclization of the diphenhydramine molecule. A double-blind, crossover study was made of the analgesic effects of intramuscular doses of 20 mg nefopam HCl, 50 mg pethidine, and saline placebo in 20 patients. Nefopam and pethidine were found to be equally effective and statistically superior to placebo. A double-blind, randomized study was made of orally administered nefopam HCl, 60 mg t.i.d., for three days and of placebo t.i.d. for three days in 80 patients. Nefopam was distinctly superior to placebo in analgesic effectiveness, both in the initial single dose and in maintaining therapeutic benefit for the duration of the three-day trial. It was concluded that nefopam is a potent analgesic of novel structure and unique physiologic properties.
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