Drug-drug interaction between itraconazole and the antiretroviral drug lopinavir/ritonavir in an HIV-1-infected patient with disseminated histoplasmosis.

Crommentuyn, Kristel M L; Mulder, Jan W; Sparidans, Rolf W; Huitema, Alwin D R; Schellens, Jan H M; Beijnen, Jos H · Clin Infect Dis · 2004

case_report · Level V

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Abstract

We describe a drug-drug interaction between coformulated lopinavir/ritonavir and itraconazole in a patient infected with human immunodeficiency virus type 1 who had disseminated histoplasmosis. Coadministration of these agents led to a strong increase in itraconazole concentrations and a decrease in concentrations of its metabolite, hydroxyitraconazole, which is equally active pharmacologically. The dosage of itraconazole was reduced when it was used in combination with lopinavir/ritonavir.

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