pentobarbital will minimize the extent or influence of etonogestrel by influencing hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Watch.pentobarbital will minimize the level or result of theophylline by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Keep an eye on.????? ??, ???? ??? ?? ????? ????? ???? ??? ??, ?????? ?