Previous Administration of Indomethacin or Naloxone Did Not Influence Ketorolac Antinociception in Mice

Abstract
Olac induced a significant dose-dependent antinociceptive effect, the intracerebroventricular administration was the most effective route. Indomethacin and naloxone pretreatments did not change the ketorolac-induced antinociception. The present findings suggest that this antinociceptive action of ketorolac is not mediated by the inhibition of prostaglandin biosynthesis nor by activation of opioid receptors. Address correspondence and reprint requests to Hugo F. Miranda, PhD, Department of Pharmacology, Faculty of Medicine, University of Chile, PO Box 70,000, Santiago 7, Chile. The authors wish to thank I. Correa, M. Mendez, and R. Saez for excellent technical assistance in the experimental work. Accepted for publication May 18, 1993. © 1993 International Anesthesia Research Society...

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