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Other antibiotics

Nitrofurantoin

Also sold as: Macrobid, Macrodantin

Prescription neededOther antibiotics

Comes as:CapsuleTablet

Usual adult dose

Other antibiotics

Nitrofurantoin

Also sold as: Macrobid, Macrodantin

Prescription neededOther antibiotics

Comes as:CapsuleTablet

Usual adult dose

Usual adult dose: 50 to 100 mg four times a day with food, or 100 mg modified-release twice a day, usually for 3 to 7 days for a bladder infection. Finish the full course.

Your doctor may give you a different dose. Children's doses depend on weight.

Side effects

Common

nausea
loss of appetite
headache
dark yellow or brown urine (harmless)

Serious — get help

Stop taking it and see a doctor straight away if you notice:

cough or breathlessness with fever
numbness or tingling of hands or feet
yellow eyes or skin
severe allergic reaction

Do not take it, or take care, if

Poor kidney function
Last weeks of pregnancy (near delivery)
Babies under 3 months
G6PD deficiency

Interactions

No important interactions are listed in our database. Still tell your doctor or pharmacist everything you take.

Pregnancy

Category B

No risk seen in animal studies, but there are few studies in pregnant women. Usually considered safe when needed.

Generic alternatives

Similar medicines your doctor or pharmacist may offer instead.

Fosfomycin
Co-trimoxazole

Check with my other medicines

Always follow your doctor or pharmacistThis page is general information, not a prescription. Do not start, stop or change a medicine on your own.