Pentobarbital will reduce the extent or result of isradipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unidentified. pentobarbital will lower the extent or outcome of fentanyl by impacting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Check Closely. Coadministration of fentanyl with CYP3A4 inducers may lead to the minimize in fentanyl p... https://sodiumpentobarbitalwiki80011.iyublog.com/22300541/the-2-minute-rule-for-sodium-pentobarbital-in-dog-food