Flukonazol i Pimozyd: interakcja

Increased pimozide plasma concentrations can lead to QT prolongation and rare occurrences of torsade de pointes.

Coadministration of fluconazole and pimozide is contraindicated.

Coadministration of other drugs known to prolong the QT interval and which are metabolized via the enzyme CYP3A4 such as erythromycin, pimozide, and quinidine are contraindicated in patients receiving fluconazole.

(See CLINICAL PHARMACOLOGY: Drug Interaction Studies .) Pimozide Although not studied in vitro or in vivo , concomitant administration of fluconazole with pimozide may result in inhibition of pimozide metabolism.

Because pimozide prolongs the QT interval of the electrocardiogram it is contraindicated in patients with congenital long QT syndrome, patients with a history of cardiac arrhythmias, patients taking other drugs which prolong the QT interval of the electrocardiogram or patients with known hypokalemia or hypomagnesemia (see also PRECAUTIONS - DRUG INTERACTIONS ).

Because azole antifungal agents are also inhibitors of the CYP 3A4 enzymes and thus may likewise impair pimozide metabolism, pimozide is contraindicated in patients receiving the azole antifungal agents itraconazole and ketoconazole.

Since pimozide is partly metabolized via CYP 3A4, it should not be administered concomitantly with inhibitors of this metabolic system, such as azole antifungal agents and protease inhibitor drugs (see CONTRAINDICATIONS ).