Medically reviewed by Jessica Swirble, PharmD
Last updated on March 16, 2024
Drug Information | Side Effects | Use & Dosage | Request a Prescription
Nitrofurantoin is an antibiotic medication used to treat urinary tract infections.
Nitrofurantoin is prescribed to treat urinary tract infections. It is only effective against bacterial infections. You should not take nitrofurantoin to treat a viral, parasitic, or fungal infection.
Nitrofurantoin belongs to a class of medications known as antibiotics. It works by killing bacteria that cause infections.
Nitrofurantoin is an oral medication. It should be taken with food or milk.
The time it takes to note the effects of nitrofurantoin will vary depending on the patient and the severity of the condition being treated. Most patients start feeling better within a few days after starting use. In the case of a severe infection, it may take longer before you feel better.
If you have been taking nitrofurantoin for several days and aren't feeling better, talk to your healthcare provider. Do not increase your dosage. If you are feeling better, do not stop using nitrofurantoin until your provider directs you to do so.
Take nitrofurantoin for as long as your provider tells you to.
Nitrofurantoin is primarily prescribed to treat urinary tract infections; talk to your healthcare provider about other uses for this medication, if appropriate.
This drug is available as an oral capsule or a liquid to be taken by mouth.
It is available in its generic form or under the brand names Furadantin, Furalan, Macrobid, and Microdantin.
Nitrofurantoin is only available via prescription. You must have a written prescription from a licensed healthcare provider to obtain this medication.