Outcomes of Other Drugs on VIAGRA Sildenafil metabolism is principally mediated by CYP3A4 (important route) and CYP2C9 (slight route). Consequently, inhibitors of such isoenzymes might lower sildenafil clearance and inducers of these isoenzymes may raise sildenafil clearance.Use an exact measuring unit to evaluate your dose of sildenafil oral liqui