Nitrofurantoin is an antibiotic and urinary antiseptic that can be used to prevent and treat bladder infections (urinary tract infections [UTIs]). It is useful in both uncomplicated UTIs and recurrent UTIs. Women can take Nitrofurantoin to prevent bladder infections caused by having sexual intercourse.
Nitrofurantoin can be taken by mouth as tablets or capsules. It is safe to use in both children and adults. The dosages for different uses in adults are listed below:
For treatment of bladder infection
50-100 mg 4 times daily for 5-7 days.
For prevention of recurrent bladder infections
50-100 mg once daily at night.
For prevention of postcoital bladder infections (on demand dosing)
50-100 mg once, within 2 hours of sexual intercourse
Common dosing schedule:
Take Nitrofurantoin with food to avoid stomach upset.
This schedule is for reference only, adjustments may be made according to individual needs.
Some common medications Nitrofurantoin may interact with:
Please notify your doctor or pharmacist if you are taking the above medication, dosage adjustments might be needed.
In Hong Kong, Nitrofurantoin is an over-the-counter medicine which can be purchased without a prescription from any retail outlet in Hong Kong. This includes grocery stores, convenience stores, medicine shops, and pharmacies. It can also be obtained from doctors. To find a pharmacy near you, refer to the list of pharmacies (“Authorized Sellers of Poisons”) from the Hong Kong Department of Health.
For more information about drug names and ingredients, you can visit Hong Kong’s Drug Office at https://www.drugoffice.gov.hk
Need more information?
For detailed information about the use of Nitrofurantoin in children, pregnancy and breastfeeding, and for questions about drug interactions, please check with your pharmacist or doctor.
Disclaimer: our goal is to provide you with the most relevant drug information and common dosage for Hong Kong. This information does not constitute medical advice. For specific treatment recommendations and advice, always discuss with your doctor or pharmacist, and follow the instructions included with your specific medicine.
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