Drug interactions
Pentobarbital + Simvastatin
Severity: Moderate
Pentobarbital and Simvastatin: moderate interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Pentobarbital induces CYP3A4, the main pathway for simvastatin clearance. Simvastatin exposure may fall and reduce its effect.
What this interaction means in plain words
Pentobarbital and Simvastatin can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Why it happens
Pentobarbital induces hepatic and intestinal CYP3A4, increasing simvastatin metabolism.
What to do
Monitor the lipid profile if pentobarbital is used repeatedly and adjust the simvastatin dose, or choose a statin less dependent on CYP3A4.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Simvastatin
- Atazanavir + Simvastatin Contraindicated
- Clarithromycin + Simvastatin Contraindicated
- Cobicistat + Simvastatin Contraindicated
- Cyclosporine + Simvastatin Contraindicated
- Cyclosporin + Simvastatin Contraindicated
- Danazol + Simvastatin Contraindicated
Frequently asked questions
Can I take Pentobarbital with Simvastatin?
MediHelp rates the interaction as moderate. Pentobarbital and Simvastatin can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Pentobarbital induces CYP3A4, the main pathway for simvastatin clearance. Simvastatin exposure may fall and reduce its effect.
How serious is the interaction between Pentobarbital and Simvastatin?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor the lipid profile if pentobarbital is used repeatedly and adjust the simvastatin dose, or choose a statin less dependent on CYP3A4.
What other medicines interact with Simvastatin?
MediHelp also lists interactions of Simvastatin with, for example, Atazanavir, Clarithromycin, Cobicistat. The full list is on the Simvastatin page.
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