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Important Update to Sustiva Package Insert

January 31, 2007

The Sustiva (efavirenz) package insert has been updated to include drug-drug interaction information regarding coadministration of efavirenz with rifampin, diltiazem, itraconazole, voriconazole, atorvastatin, pravastatin, simvastatin, pimozide and bepridil.

The Clinical Pharmacology section (Tables 1 and 2 ) were revised to include the results of drug-drug interactions studies with diltiazem, itraconazole, voriconazole, atorvastatin, pravastatin, and simvastatin.

The CONTRAINIDCATION section was revised to state Sustiva should not be administered concurrently with bepridil, pimozide and standard doses of voriconazole.

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The PRECAUTION: Drug Interaction section (Tables 5 and 6) were updated to include information regarding coadministration of efavirenz with rifampin, diltiazem (and other calcium channel blockers), itraconazole, ketoconazole, voriconazole, pimozide and bepridil.

The Dosing and Administration section was updated to include dosing information for the co administration of efavirenz and voriconazole. Specifically, if Sustiva is coadministered with voriconazole, the voriconazole maintenance dose should be increased to 400 mg every 12 hours and the SUSTIVA dose should be decreased to 300 mg once daily using the capsule formulation (three 100-mg capsules or one 200-mg and one 100-mg capsule). SUSTIVA tablets should not be broken.

Please refer to the attached pdf file for a detailed summary of the changes in the revised package insert.



  
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This article was provided by U.S. Food and Drug Administration. Visit the FDA's website to find out more about their activities and publications.
 
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