pentobarbital will lower the extent or effect of etonogestrel by influencing hepatic/intestinal enzyme CYP3A4 metabolism. Use Warning/Keep an eye on.pentobarbital will reduce the level or impact of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Steer clear of or Use Alternate Drug. Potent CYP3A4 inducers are anticipated to cau