Sildenafil citrate 50 mg did not potentiate the increase in bleeding time caused by aspirin mg. Similar values for pharmacokinetic parameters were seen in normal volunteers and in the patient population, using a population pharmacokinetic approach. Concomitant administration of strong CYP3A4 inducers, such as rifampin, is expected to cause greater decreases in plasma levels of sildenafil. Sildenafil at steady state, at a dose not approved for the treatment of erectile dysfunction 80 mg t. In vivo studies: No significant interactions were shown with tolbutamide mg or warfarin 40 mg , both of which are metabolized by CYP2C9. The changes from baseline in scoring on the two end point questions frequency of successful penetration during sexual activity and maintenance of erections after penetration were highly statistically significantly in favor of sildenafil tablets. · SC Pill Identification (Blue/Oval) SC Pill is identified as a blue, oval pill with an “SC” on one side and a ″ imprint on the other. This pill contains Sildenafil . Pill Identifier results for “S “. Search by imprint, shape, color or drug name.