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Can I take Bisoprolol and Duloxetine together?

Drug interaction guide

Taking bisoprolol and duloxetine together may cause your blood pressure to drop too low or your heart rate to slow down more than intended. You might feel dizzy, lightheaded, or faint, especially when standing up. Additionally, duloxetine can slightly increase the levels of bisoprolol in your blood, making its effects stronger.

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Why this happens

Duloxetine can interfere with a specific liver enzyme (CYP2D6) that helps break down bisoprolol, leading to higher levels of the heart medication in your system. Furthermore, both drugs can lower blood pressure and heart rate through different pathways in the body, leading to an 'additive' effect where the combined impact is stronger than either drug alone.

You can usually take these medicines together, but you should be cautious. Monitor your blood pressure and heart rate regularly. If you feel very dizzy, weak, or like you might faint, sit or lie down immediately and contact your doctor. Your doctor may need to adjust your doses, especially when first starting duloxetine or changing the dose.

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Taking multiple medicines? Our Medicines Interaction Checker helps you check whether your prescriptions, over-the-counter medicines, and supplements are safe to take together. Simply search for your medicines to see potential interactions and what to do about them.

Disclaimer

This information is for general educational purposes only and should not be relied upon as a substitute for professional medical advice. Always consult your GP, pharmacist, or another qualified healthcare professional before making decisions about your medications. Individual circumstances may vary, and only a healthcare professional who knows your medical history can provide personalised guidance.

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Article history

The information on this page is written and peer reviewed by qualified clinicians.

  • 14 Mar 2026 | Originally published
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