The biotransformation of nikethamide in the rat and its acceleration by hexachlorocyclohexane

J. Portig, W. Koransky, D. Wahner-Roedler

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


1. Nicotinic acid monoethylamide, nicotinamide, and nikethamide-N-oxide have been identified, by cocrystallization with authentic carriers, as major products of the biotransformation of tritiated nikethamide in the rat. Nicotinic acid appears to be a minor metabolite of the analeptic in this species. 2. Both N-desalkylation and N-oxidation of nikethamide are enhanced in rats given 200 mg/kg of alpha-hexachlorocyclohexane once i.p. The beta- and gamma-isomers of hexachlorocyclohexane, when tested for their effect on the capacity of rat liver to desethylate the analeptic in vitro, have been found to be as affective as the alpha-isomer. 3. A convulsive dose of nikethamide given i.p. is shown to become ineffective in rats pretreated with alpha-hexachlorocyclohexane primarily as a consequence of accelerated biotransformation of the analeptic. 4. Rats can be made tolerant of nikethamide by daily injection of a convulsive dose of the drug for four to five days. Such animals metabolize 3H-nikethamide faster than non-tolerant controls.

Original languageEnglish (US)
Pages (from-to)154-170
Number of pages17
JournalNaunyn-Schmiedeberg's Archives of Pharmacology
Issue number2
StatePublished - Jun 1972


  • Enhanced Drug Detoxication
  • Hexachlorocyclohexane
  • Nikethamide Biotransformation
  • Nikethamide Tolerance

ASJC Scopus subject areas

  • Pharmacology


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