Can I take Lactulose and Ripinrole together?
Drug interaction guide
Originally published 25 Jan 2026
Meets Patient’s editorial guidelines
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There are no known direct interactions between lactulose and ropinirole. It is generally safe to take these two medicines together.
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Why this happens
Lactulose is a laxative that stays in the bowel and is not absorbed into the bloodstream. Ropinirole is absorbed into the blood to treat Parkinson's disease or Restless Legs Syndrome. Because they work in different parts of the body and are processed through different pathways, they do not interfere with each other.
What you should do
Back to contentsYou can continue taking both medicines as prescribed. However, if you experience severe diarrhoea from the lactulose, this could theoretically affect how other medicines are absorbed. If you have persistent diarrhoea, speak to your doctor or pharmacist.
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Using other medicines
Back to contentsTaking 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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Can I take Black cohosh and St John's wort together?
Taking black cohosh and St John's wort together may increase the risk of liver irritation or damage. While both are often used together for menopause symptoms, there have been rare reports of liver problems associated with these supplements. Additionally, St John's wort can change how the body processes other substances, which might alter the levels of black cohosh in your system.
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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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