Fosfomycin

Presciption Medicine
  • Uncomplicated urinary tract infections (e.g., cystitis)
  • Complicated UTIs, including acute pyelonephritis
  • Prophylaxis of urinary infections before surgical procedures
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Product Information

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Medically Verified
Dr G Varbanov

Dr. Georgi Varbanov

General Medicine Doctor | UIN: 0400005105
Reviewed on: 7 April, 2025 View Profile

Dr. Georgi Varbanov is a family medicine physician dedicated to evidence-based care and disease prevention.

Fosfomycin is an antibiotic used to treat uncomplicated urinary tract infections (UTIs), particularly those affecting the bladder. It is often prescribed as a single-dose treatment, making it a convenient and effective option for managing lower urinary tract infections caused by susceptible bacteria, such as Escherichia coli.

Fosfomycin works by interfering with the bacterial cell wall, ultimately stopping the growth and spread of the bacteria responsible for the infection. This action helps relieve common UTI symptoms such as painful urination, frequent urges to urinate, lower abdominal discomfort, and cloudy or strong-smelling urine.

One of the most common forms of fosfomycin is a sachet of granules dissolved in water and taken as a one-time oral dose. This single-dose treatment is especially appealing for patients looking for a straightforward and fast-acting option without the need for a multi-day course of antibiotics. Within hours of taking the dose, many patients begin to notice symptom relief.

Fosfomycin is often recommended when first-line antibiotics are not suitable, or when resistance to other medications is suspected or confirmed. Side effects are usually mild and short-lived. They may include headache, nausea, diarrhoea, or vaginal irritation.

General Information

What is [Product name]?

Fosfomycin is a broad-spectrum antibiotic that works by killing bacteria responsible for infections. It is commonly used to treat urinary tract infections (UTIs), including acute cystitis.

What is [Product name] used for?

Fosfomycin is primarily prescribed to treat uncomplicated UTIs caused by bacteria such as E. coli or Enterococcus faecalis.

How does [Product name] work in the body?

Fosfomycin disrupts bacterial cell wall synthesis by inhibiting an enzyme called MurA, which prevents bacteria from multiplying and ultimately kills them.

What is the general recommended dosage for [Product name]?

For uncomplicated UTIs, the usual dose is one 3g sachet taken as a single oral dose.

How long does it take to feel the effects of [Product name]?

Fosfomycin starts working within hours, and most people notice symptom improvement within 2–3 days after taking it.

What should I do if I forget a dose?

If you miss a dose, take it as soon as you remember. If it’s close to the time for your next scheduled dose, skip the missed dose and continue as normal. Do not take a double dose to make up for the missed one.

Safety & Side Effects

What are the possible side effects of [Product name]?

Common side effects include nausea, diarrhoea, headache, and vaginal itching. Rare but serious side effects may involve severe allergic reactions or liver problems.

Can [Product name] cause allergies?

Yes, some people may experience allergic reactions such as skin rash, swelling, or difficulty breathing. Seek medical attention if you notice any signs of an allergy.

Is [Product name] safe for long-term use?

Fosfomycin is typically used as a short-term treatment.

Can I combine [Product name] with other medications?

Some medications can interact with Fosfomycin, such as metoclopramide or live vaccines. Always inform your doctor about any medicines you are taking to avoid interactions.

Does [Product name] affect sleep or alertness?

Fosfomycin may cause mild dizziness in some individuals but does not typically affect sleep or alertness significantly.

Can I use this if I am pregnant or breastfeeding?

Fosfomycin is considered safe during pregnancy and breastfeeding when prescribed by a doctor. However, caution is advised in both cases.

Is it safe to drink alcohol while using [Product name]?

It is generally best to avoid alcohol while taking antibiotics like Fosfomycin to ensure optimal effectiveness and reduce potential side effects.

Usage & Administration

How do I administer [Product name]?

Dissolve the contents of one sachet in cold water and drink immediately. It works best on an empty stomach or at least 2–3 hours after eating.

What if I take too much [Product name]?

In case of an overdose, seek emergency medical attention immediately. Symptoms may include dizziness, nausea, or electrolyte imbalances.

Who should not take [Product name]?

Fosfomycin should not be taken by individuals allergic to it or its components. It is also not recommended for those with severe kidney impairment or certain medical conditions without additional medical consultation.

How should I store [Product name] properly?

Store Fosfomycin at room temperature in its original packaging away from heat and moisture. Keep it out of reach of children.

Should I take [Product name] with food?

Fosfomycin can be taken with or without food but is more effective on an empty stomach.

Can I crush or dissolve the tablet in water?

Fosfomycin comes in sachets rather than tablets. The powder must be dissolved in water before consumption; do not consume it dry.

Ordering & Delivery

How can I order [Product name] online?

Start your order for Fosfomycin by completing a health form or scheduling a doctor call. Once approved, the pharmacy will take care of the shipment to your home.

Do I need a prescription for [Product name]?

Yes, you'll need a prescription to purchase Fosfomycin. Complete an online form or consult with a doctor to proceed.

How fast is [Product name] delivered?

Fosfomycin is usually delivered in 1–2 business days after the prescription is received by the pharmacy.

Can I return [Product name] if I change my mind?

Due to legal pharmacy rules, Fosfomycin cannot be returned once dispensed. Be sure before confirming your order.

Product Documentation

All Variants

Select a variant to see specific documentation. Leaflets are provided for information purposes only. The official leaflet in the language of the country of delivery is supplied with the order.

EN

Fosfomycin

111.27 KB Feb 2026
Informational leaflet with dosage instructions and safety information.
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