pentobarbital will decrease the extent or result of fostemsavir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated.pentobarbital will reduce the level or influence of doxorubicin liposomal by impacting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Watch.pentobarbital will decrease the extent or result of tamoxifen