The antipyretic effect of UP 517-03 in the rabbit.

The antipyretic effect of UP 517-03 was studied in rabbits, provided with a cannula in the lateral cerebral ventricle. Given orally as a curative treatment, UP 517-03 can abolish hyperthermic reactions induced by intracerebroventricular injection of sodium arachidonate or bacterial endotoxin. A comparison with acetylsalicylic acid and indomethacin is given. UP 517-03 does not modify the temperature of normothermic rabbits. These results suggests that the antipyretic action of UP 517-03 can be explained by an effect of this substance on the metabolism of arachidonic acid in brain.