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Can I take Solifenacin and St john's wort together?

Drug interaction guide

Taking St John's Wort may make solifenacin less effective at treating your bladder symptoms. You might find that your symptoms, such as the urgent need to urinate or frequent trips to the toilet, return or get worse while taking this herbal remedy.

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Why this happens

St John's Wort is a 'liver enzyme inducer'. This means it speeds up the process by which your liver breaks down certain medicines. Because it makes your body process solifenacin much faster than usual, the levels of the medicine in your blood drop, preventing it from working properly.

What you should do

You should avoid taking St John's Wort while you are prescribed solifenacin. If you are already taking both, do not stop the herbal remedy suddenly; instead, speak to your doctor or pharmacist. They can advise you on how to stop the supplement safely and may need to monitor your bladder symptoms or adjust your medication.

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Using other medicines

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.

  • 25 Jan 2026 | Originally published
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