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Comments, Opinions, and Brief Case Reports |

Quadricyclic Antidepressant Overdosage in a Patient With AIDS Under Mega–Highly Active Antiretroviral Therapy

Laurent Hocqueloux, MD; Sébastien Gallien, MD; Caroline Bornstain, MD; Jean-Michel Molina, MD
Arch Intern Med. 2001;161(18):2260-2261. doi:.
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We describe a patient with acquired immunodeficiency syndrome (AIDS) who experienced severe hypotension and cardiac conduction trouble due to maprotiline hydrochloride (a quadricyclic antidepressant agent) overdosage within weeks of beginning a new therapy with a combination of antiretroviral drugs: stavudine (40 mg twice a day), ritonavir (400 mg twice a day), saquinavir mesylate (400 mg twice a day), indinavir sulfate (400 mg twice a day), and amprenavir (900 mg twice a day). We believe that the overdosage resulted from strong inhibition of cytochrome P450 2D6 (CYP2D6) (the pathway of maprotiline hydroxylation) by ritonavir and/or fluconazole.

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