Drug interactions
Bisoprolol + Primidone
Severity: Minor
Bisoprolol and Primidone: minor 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
Primidone is metabolized to phenobarbital and acts as an enzyme inducer, which may lower bisoprolol exposure. The clinical effect is usually modest because bisoprolol has dual elimination routes.
What this interaction means in plain words
Bisoprolol and Primidone have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Bisoprolol belongs to Cardiovascular; Primidone belongs to Central Nervous System.
Why it happens
Induction of hepatic CYP enzymes by primidone and its metabolite phenobarbital increases bisoprolol metabolism.
What to do
Monitor heart rate and blood pressure after starting or stopping primidone. Increase the bisoprolol dose if needed.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Bisoprolol
Other interactions of Primidone
- Lorlatinib + Primidone Contraindicated
- Lurasidone + Primidone Contraindicated
- Primidone + Ranolazine Contraindicated
- Primidone + Sofosbuvir-velpatasvir-voxilaprevir Contraindicated
- Primidone + Voriconazole Contraindicated
- Abiraterone + Primidone Major
Frequently asked questions
Can I take Bisoprolol with Primidone?
MediHelp rates the interaction as minor. Bisoprolol and Primidone have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Primidone is metabolized to phenobarbital and acts as an enzyme inducer, which may lower bisoprolol exposure. The clinical effect is usually modest because bisoprolol has dual elimination routes.
How serious is the interaction between Bisoprolol and Primidone?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor heart rate and blood pressure after starting or stopping primidone. Increase the bisoprolol dose if needed.
What other medicines interact with Bisoprolol?
MediHelp also lists interactions of Bisoprolol with, for example, Aldesleukin, Amifostine, Amiodarone. The full list is on the Bisoprolol page.
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