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Doxazosin, silodosin and tamsulosin, alpha 1-adrenoreceptor antagonists, were added to the section 4 Contraindications due to the potential for alpha 1-adrenoreceptor antagonist-associated adverse events such as hypotension and priapism.
In section 7 Drug Interactions the calcium channel blockers, amlodipine, dilitiazem, nisoldipine and verapamil were added.
The complete, revised label will be posted soon to the Drugs@FDA, and DailyMed sites.
Victrelis is a product of Merck & Co.
Richard Klein
Office of Health and Constituent Affairs
Food and Drug Administration
Kimberly Struble
Division of Antiviral Drug Products
Food and Drug Administration