The Clinical Relevance of Preclinical Data: Mirtazapine, a Model Compound

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This paper discusses how in vitro and preclinical in vivo studies might be of help for the interpretation and prediction of possible clinically relevant effects.The examples given refer to the data obtained with mirtazapine, a novel antidepressant with a dual mechanism of action, which can be best summarized as a noradrenergic and specific serotonergic antidepressant. Preclinical data on mirtazapine have shown that (i) its binding to plasma proteins is relatively low and nonspecific; (ii) the contribution of its metabolites to the pharmacologic effect is negligible; (iii) it possesses high bioavailability, resulting in a low variance between individuals; (iv) it has no inducing or inhibiting effects on the hepatic P450 enzymes; (v) it has a very low potential for clinically relevant pharmacokinetic interactions with other drugs; and (vi) its disposition is independent of polymorphic CYP2D6 activity. The available preclinical data on mirtazapine could be used to advise clinicians and to guide clinical practice. (J Clin Psychopharmacol 1997;17[suppl 1]:29S-33S).

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