Antibiotic tablets or capsules for your UTI.
UTIs are a common infection that can affect your bladder, kidneys and urethra. They can be caused by factors like incomplete bladder emptying, kidney stones, incorrect wiping technique or not urinating after sex. And although they can clear up on their own, they might need treatment with antibiotics. Nitrofurantoin is an antibiotic that can be taken as a capsule or tablet, and targets the bacteria causing your UTI at the site of the infection.
You might start to feel better after only a few days while taking Nitrofurantoin, but as with all antibiotics, it’s important to finish the entire course of tablets or capsules. Unlike other antibiotics, Nitrofurantoin is used solely to treat and prevent lower urinary tract infections like cystitis.
Antibiotics work by killing or stopping the spread of bacteria. Unlike other antibiotics that are prescribed to treat a wide range of infections, like penicillin, Nitrofurantoin is used specifically for urinary tract infections (UTIs). When these infections affect the bladder, it’s called cystitis. Cystitis can also be treated with Nitrofurantoin.
To reach the site of the infection, a Nitrofurantoin filters out from your blood and into your urine. Here, it can target the bacteria in your urinary tract and destroy them. Although antibiotics can start to work within a few days, you’ll need to take the entire course to make sure your infection has cleared.
Nitrofurantoin is available in 50mg or 100mg strength tablets and capsules. The standard dose to clear a urinary tract infection for adults is four 50mg tablets or capsules each day, for seven days. The strength you’re prescribed can depend on how severe your UTI is and how often you get them.
The capsules are also available in 100mg, modified-release form which are taken twice a day. These might be suitable if you want to swallow fewer tablets or capsules, or feel like it suits your daily routine better.
Whichever strength you’re prescribed, you should try to space the doses out over the day to avoid taking too little or too much Nitrofurantoin. If you’re taking two capsules or tablets a day, try to leave 12 hours between each dose. If you’re taking four 50mg tablets or capsules, take one in the morning, one around midday, your third in the late afternoon and your final dose before you go to bed.
How we source info.
When we present you with stats, data, opinion or a consensus, we’ll tell you where this came from. And we’ll only present data as clinically reliable if it’s come from a reputable source, such as a state or government-funded health body, a peer-reviewed medical journal, or a recognised analytics or data body. Read more in our editorial policy.
Nitrofurantoin capsules and tablets should be swallowed whole with a glass of water.
It’s recommended you take Nitrofurantoin with food or a glass of milk to avoid an upset stomach. It also helps the medication absorb into your system more easily.
You might start feeling better after only a few days of using Nitrofurantoin. To make sure the infection has cleared completely, you should take the entire course of medication as it’s been prescribed.
As you can’t always see visible evidence of medications like Nitrofurantoin working, it can be easy to think your UTI has been treated as soon as you stop experiencing uncomfortable symptoms like pain in your tummy or a frequent urge to urinate. Stopping Nitrofurantoin before the full course is finished can lead to future urinary tract infections, and can even help the bacteria that causes them become resistant to antibiotics.
If you’ve still got symptoms after completing your course of Nitrofurantoin, let your clinician know. If cystitis is left untreated it could cause complications like kidney infections, scarring or blood in your urine.
Doses of Nitrofurantoin should be spaced out so the medication can work effectively. If you forget to swallow a tablet or capsule at your usual time, you can take it as soon as you remember provided it’s not too soon before your next dose is due. In that case, just skip the one you missed and carry on your usual dosage routine.
If for any reason you take too much Nitrofurantoin, go to your nearest hospital's emergency department immediately.
How we source info.
When we present you with stats, data, opinion or a consensus, we’ll tell you where this came from. And we’ll only present data as clinically reliable if it’s come from a reputable source, such as a state or government-funded health body, a peer-reviewed medical journal, or a recognised analytics or data body. Read more in our editorial policy.
Have something specific you want to know? Search our info below, or ask our experts a question if you can’t find what you’re looking for.
“About Nitrofurantoin.” Nhs.uk, Accessed 29 June 2023.
“Nitrofurantoin.” PubMed, StatPearls Publishing,
“In VitroAntimicrobial Resistance of Urinary Escherichia Coli Isolates among U.S. Outpatients from 2000 to 2010.” Antimicrobial Agents and Chemotherapy, vol. 56, no. 4, 17 pp. 2181–2183.
“Fact versus Fiction: A Review of the Evidence behind Alcohol and Antibiotic Interactions.” Antimicrobial Agents and Chemotherapy, vol. 64, no. 3, 23
“Common Questions about Nitrofurantoin.” Nhs.uk, Accessed 29 June 2023.
“Nitrofurantoin: MedlinePlus Drug Information.” Medlineplus.gov
“Trimethoprim Once Daily vs. Nitrofurantoin in Treatment of Acute Urinary Tract Infections in Young Women, with Special Reference to Periurethral, Vaginal, and Fecal Flora.” Reviews of Infectious Diseases, vol. 4, no. 2, pp. 378–387.
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12 Tablets | £52.95 |
28 Tablets | £72.95 Save £50.60 |
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6 Capsules | £42.95 |
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6 Tablets | £38.95 |
14 Tablets | £50.95 Save £39.93 |
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UTI: Here are some other options.
Effective antibiotic capsule that you take just twice a day.
Clears persistent UTIs. 3 day course for women, 7 day course for men.
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