Among the drugs that may interact with Sildenafil meds contained in a trial pack are antibiotic like clarithromycin, erythromycin or telithromycin; antifungals like itraconazole, fluconazole, ketoconazole, or voriconazole; high blood pressure drugs like alfuzosin, doxazosin, prazosin, terazosin, or tamsulosin; HIV medications like darunavir, efavirenz, etravirine, nevirapine, fosamprenavir, indinavir, or ritonavir, and others. To get a complete list of drug interactions, visit your local doctor.