Can I take Lactulose and Quinine together?

Why this happens

Lactulose is a laxative that can cause electrolyte imbalances (like low potassium) if used excessively. Quinine can affect the electrical activity of the heart (prolonging the QT interval). If potassium levels are low, this heart-related side effect of quinine is more likely to occur.

What you should do

It is generally safe to take these together at recommended doses. However, if you develop severe or persistent diarrhoea while taking lactulose, stop using it and speak to your doctor, as this can affect your mineral levels and make quinine less safe for your heart.

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.