Antidepressant profile of bupropion and three metabolites in mice

Pharmacopsychiatry
P MartinA J Puech

Abstract

Bupropion is a novel antidepressant, distinct from tricyclic antidepressants both neurochemically and behaviorally. Bupropion forms several metabolites in both rodents and humans. Three chemically different molecules - BW 306, BW 494, and BW 287 - were selected. Comparative assessment of antidepressant activity of bupropion and its metabolites in mice, and pharmacological analysis of possible mechanisms of action of the parent drug and its metabolites (using interaction studies with pimozide, D,L-propranolol, and prazosin) were carried out. The results obtained show that: bupropion has a pharmacological spectrum in various animal models which predicts both antidepressant and stimulatory activity in man. BW 306 is the most active of the metabolites studied and, compared to bupropion, seems more "antidepressant" and less stimulant. BW 494, compared to bupropion or BW 306, has a lower degree of activity in various tests used to evaluate antidepressants. BW 287 has no effect in any of the tests used in this study. The interaction studies with pimozide, D,L-propranolol, and prazosin in the various tests have shown that: the stimulatory effect of bupropion, BW 306, and BW 494 is antagonized by both pimozide and prazosin. in the behav...Continue Reading

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