
Taking an extra dose of nitrofurantoin is unlikely to harm you. You could also ask your pharmacist for advice on other ways to help you remember to take your medicine. If you often forget doses, it may help to set an alarm to remind you. Never take an extra dose to make up for a forgotten one. In this case, just leave out the missed dose and take your next dose at the usual time. If you forget to take a dose of nitrofurantoin, take it as soon as you remember, unless it's nearly time for your next dose.

to prevent a urinary tract infection – 50mg to 100mg taken as standard tablets or capsules, once a day at nightĭoses are usually lower for children. Nitrofurantoin 100mg Prolonged-Release Capsules is specifically indicated for the treatment of infections when due to susceptible strains of Escherichia coli.Severe infections may need a higher dose of 100mg taken as standard tablets or capsules, 4 times a day to treat a urinary tract infection – either 100mg taken as slow release capsules, twice a day, or 50mg taken as standard tablets or capsules, 4 times a day.The usual adult dose of nitrofurantoin is:

Nitrofurantoin tablets and capsules come as 50mg or 100mg strengths. The dose of nitrofurantoin you take depends on whether it's to treat or prevent a urinary tract infection, your age, and how bad the infection is. Always follow your doctor or pharmacist's advice, and the instructions that come with your medicine.
