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Can I take Furosemide and Lansoprasole together?

Drug interaction guide

Taking these two medicines together can lead to low levels of magnesium in your blood. It may also increase the risk of low levels of potassium, sodium, and calcium. Low magnesium can cause symptoms like tiredness, muscle cramps, or an irregular heartbeat.

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Why this happens

Both medicines can cause the body to lose minerals. Furosemide (a water tablet) makes you lose minerals through your urine. Lansoprazole (a stomach acid reducer) can interfere with how your body absorbs magnesium from your food. When used together, these effects can add up.

You can take these medicines together, but your doctor may want to perform regular blood tests to check your mineral levels. If you experience unusual muscle cramps, weakness, or a fluttering feeling in your heart, contact your doctor. Your doctor might suggest a magnesium supplement if your levels become too low.

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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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