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Is this the medicine your doctor gave you for your urinary tract infection? Let's talk about Fosfomycin!

MBBS

Medically reviewed by MBBS — Updated on Jul 14, 2026 · 7 min read

Is this the medicine your doctor gave you for your urinary tract infection? Let's talk about Fosfomycin!
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Do you sometimes experience burning when you urinate, frequent urination, or a slight pain in your lower abdomen? Most often, these symptoms are caused by a urinary tract infection (UTI). So, when you go to see a doctor, he or she may have given you a medicine that comes in a powder-like packet and you have to dissolve it in water and drink it. That medicine is most likely called Fosfomycin. In this article, we will talk about this medicine called Fosfomycin in detail.

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What is Fosfomycin?

Simply put, Fosfomycin is an antibiotic . It works by killing certain types of bacteria that have entered our bodies. Specifically, this medicine is used to treat bacterial infections of the urinary tract . A doctor will prescribe this medicine when you have a bacterial infection in your bladder or urethra.

Sometimes this medicine can be used for other infections as well. So if you have any further questions about this medicine, it is best to ask your doctor or pharmacist. This medicine may be available in the market under names such as (Monurol).

What are the things you need to tell your doctor before taking this medicine?

Before you start taking Fosfomycin, it is important to tell your doctor about some important information about your health condition. This information will help your doctor decide whether this medicine is right for you or not.

If you have any of these things, be sure to tell your doctor :

  • Kidney disease: If you have any kidney problems, you should tell your doctor . This medicine may not be properly removed from your body if your kidneys are not working properly.
  • If you have an allergic reaction to fosfomycin or other medicines, foods, dyes, or preservatives: Tell your doctor if you have had an allergy to fosfomycin in the past, or if you have any other allergies to any medicines or foods.
  • If you are pregnant or trying to get pregnant: It is very important to ask your doctor before taking any medication during pregnancy.
  • If you are a breastfeeding mother: Some medications can pass to your baby through breast milk. So if you are breastfeeding, you should also tell your doctor .

If you tell the doctor this information without hiding it, he can treat you more safely.

How do you use this medicine?

Fosfomycin is an oral medication. You should follow the instructions on the medication package that your doctor has given you.

This is usually how it is used:

1. Add the powder from the medicine packet to 3 to 4 ounces of cold water (about a cup) .

2. Then stir well and dissolve.

3. Drink it immediately after dissolving it.

This medicine can be taken before, after, or on an empty stomach. However, do not take more than the amount prescribed by your doctor or more often.

Remember: This medicine is often given as a single dose . That means you only need to take it once.

When to give this medicine to small children?

Talk to your pediatrician about giving this medicine to children. Sometimes special care may be needed. Do not give this medicine to young children without the advice of a doctor.

What to do if you take too much medicine?

If you think you have taken too much of this medicine, that is, an overdose, call the nearest emergency room or poison control center immediately. Or go to a hospital immediately.

Important note: This medicine has been prescribed for you only. Therefore, do not give your medicine to anyone else, even if they have the same condition as you.

What do you do if you miss a medication appointment?

This is not usually the case. Fosfomycin is a single-dose medication, so there is no way to skip a dose.

What other things can interact with this medicine? (Interactions)

Tell your doctor about any other medications you take, herbal products you use, vitamins, or dietary supplements you take, as some things can interact with Fosfomycin.

In particular, if you are taking the drug metoclopramide, it may interact with fosfomycin.

This list does not include all interactions. So it is best to tell your doctor about everything you take. Also tell your doctor if you smoke, drink alcohol, or use illegal drugs.

What should you be careful about when taking the medicine?

If your symptoms do not improve after two or three days of taking Fosfomycin, or if they seem to be getting worse, tell your doctor or healthcare provider immediately.

What are the possible side effects of this medicine?

Like any medicine, Fosfomycin can cause side effects in some people. But these don't happen to everyone, right? Only to some people.

Side effects that you should tell your doctor about immediately:

If you experience any of these symptoms, you should see a doctor as soon as possible:

  • Allergic reactions: skin rash, itching or hives, swelling of the face, lips, or tongue.
  • Breathing problems.
  • Changes in vision.
  • Fever, flu-like symptoms.
  • Feeling unusually weak or tired.
  • Yellowing of the eyes or skin. This could be a liver problem.

Side effects that are usually not serious, but are bothersome if they persist, should be reported to your doctor :

These are usually not serious, but if they persist, tell your doctor if they bother you:

  • Diarrhea: Some people may experience diarrhea after taking this medicine.
  • Dizziness.
  • Headache.
  • Runny nose.
  • Sore throat.
  • Stomach upset, nausea.
  • Vaginal itch or irritation: Women may experience this sometimes.

This list may not include all side effects. If you notice anything unusual, talk to your doctor. You can also report side effects to the FDA at 1-800-FDA-1088.

How should I store this medicine?

  • Keep it out of reach of children. This is very important.
  • Store at room temperature. That is, between 15 and 30 degrees Celsius (15 and 30 degrees C) or between 59 and 86 degrees Fahrenheit (59 and 86 degrees F).
  • Keep the medicine packet tightly closed.
  • Do not use expired medicine. Throw away any medicine left after the expiration date.

The most important thing - remember!

So, Fosfomycin is an antibiotic given for urinary tract infections. It's usually a single dose.

The most important things you need to remember are:

* Use the medicine exactly as the doctor tells you.

* Tell your doctor about any other illnesses you have, any other medications you take, and any allergies you have.

* If you experience any unusual symptoms after taking the medicine, tell your doctor .

* This medicine is for you only, do not give it to anyone else.

We hope this article has given you a good understanding of Fosfomycin. But remember, this is just a summary. If you have any further questions, it is best to ask your doctor, pharmacist, or healthcare provider. Stay healthy!

❓ FAQ

FAQ

Evidence-based clinical answers to common patient questions

When to give this medicine to small children?

Talk to your pediatrician about giving this medicine to children. Sometimes special care may be needed. Do not give this medicine to young children without the advice of a doctor.

What to do if you take too much medicine?

If you think you have taken too much of this medicine, that is, an overdose, call the nearest emergency room or poison control center immediately. Or go to a hospital immediately.

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⚠️ Important: Medical articles and information on Nirogi Lanka are strictly for educational and awareness purposes and do not substitute professional medical advice, diagnosis, or treatment. Always consult a qualified physician for any medical concerns.