pentobarbital will minimize the level or influence of armodafinil by impacting hepatic/intestinal enzyme CYP3A4 metabolism. Small/Significance Not known.pentobarbital increases toxicity of ifosfamide by impacting hepatic/intestinal enzyme CYP3A4 metabolism. Use Warning/Observe. CYP3A4 inducers may boost the metabolism of ifosfamide to its Energetic