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Can I take Furosemide and Soft together?

Drug interaction guide

There is no known interaction between furosemide and 'soft' (assuming this refers to soft drinks or water). However, if 'soft' refers to 'softened water', it may contain higher levels of sodium, which can counteract the effects of furosemide.

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Why this happens

Furosemide is a 'water pill' (diuretic) that helps the body get rid of excess salt and water. Softened water replaces calcium and magnesium with sodium. Consuming high amounts of sodium can make furosemide less effective at reducing fluid build-up.

What you should do

You can continue to take your medication with your usual drinks. However, if you have been told to follow a low-salt diet for your heart or kidneys, be aware that softened water contains more sodium than hard water. If you notice increased swelling in your ankles or shortness of breath, speak to your doctor.

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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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