About Nitrofurantoin

Nitrofurantoin is an antibiotic. It's used to treat and prevent lower urinary tract infections (UTIs), such as cystitis.

When you take nitrofurantoin, your body quickly filters it out of your blood and into your pee. This is useful if you have a urinary tract infection because it means the medicine is concentrated at the site of infection. But it means nitrofurantoin will not work for any other types of infection.

Nitrofurantoin is available on prescription. It comes as capsules, tablets and a liquid that you swallow.

Key facts

• The most common side effect of nitrofurantoin is an upset stomach. Taking this medicine with or straight after food will help prevent this.
• You'll feel better within a few days for most infections.
• You can drink alcohol while taking nitrofurantoin.
• Nitrofurantoin may turn your pee dark yellow or brown. This is normal. Your pee will return to its usual colour after you finish taking the medicine.
• It's important to complete your course of nitrofurantoin, even if you feel better, to stop your infection coming back.

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