Drug interactions
Amlodipine-atorvastatin + Phenobarbital
Severity: Moderate
Amlodipine-atorvastatin and Phenobarbital: 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
Phenobarbital induces CYP3A4 and may lower amlodipine and atorvastatin concentrations. This can reduce blood pressure and cholesterol control.
What this interaction means in plain words
Amlodipine-atorvastatin and Phenobarbital 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
Barbiturate-mediated induction of CYP3A4 increases metabolism of both drugs.
What to do
Monitor blood pressure and lipids, and increase doses if control is lost. Reassess when phenobarbital is stopped.
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 Amlodipine-atorvastatin
Frequently asked questions
Can I take Amlodipine-atorvastatin with Phenobarbital?
MediHelp rates the interaction as moderate. Amlodipine-atorvastatin and Phenobarbital 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. Phenobarbital induces CYP3A4 and may lower amlodipine and atorvastatin concentrations. This can reduce blood pressure and cholesterol control.
How serious is the interaction between Amlodipine-atorvastatin and Phenobarbital?
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 blood pressure and lipids, and increase doses if control is lost. Reassess when phenobarbital is stopped.
What other medicines interact with Amlodipine-atorvastatin?
MediHelp also lists interactions of Amlodipine-atorvastatin with, for example, Amifostine, Apalutamide, Atazanavir. The full list is on the Amlodipine-atorvastatin page.
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