Pentobarbital will decrease the level or effect of alfentanil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown. pentobarbital will decrease the level or effect of diclofenac by affecting hepatic enzyme CYP2C9/10 metabolism. Minor/Significance Unknown. pentobarbital will decrease the level or effect of abiraterone by affecting hepatic/intestinal enzy... https://listbell.com/story10119842/una-chiave-semplice-per-pentobarbital-for-cats-unveiled