Description
What is Fosfomycin 3g?
Fosfomycin (fosfomycin trometamol) is a broad-spectrum antibiotic supplied as granules in a single-dose 3g sachet. Unlike many antibiotics that require several days of treatment, uncomplicated cystitis is commonly treated with just one sachet, making it a convenient and effective option when clinically appropriate.
What is Fosfomycin Used For?
Fosfomycin 3g Sachet is prescribed for:
- Acute uncomplicated urinary tract infections (UTIs)
- Acute bacterial cystitis
- Bladder infections caused by susceptible bacteria
Once you have selected the treatment our GP will determine whether this medicine is appropriate based on your symptoms, medical history, and current clinical guidelines.
How Does Fosfomycin Work?
Fosfomycin belongs to a class of antibiotics that stop bacteria from forming their protective cell walls. Without a functioning cell wall, bacteria are unable to survive, allowing your body’s immune system to clear the infection.
How to Take Fosfomycin 3g Sachet
- Dissolve the contents of one sachet in a glass of water.
- Drink the solution immediately after mixing.
- Take on an empty stomach, ideally 2–3 hours after food.
- For best results, many patients are advised to take it before bedtime after emptying the bladder.
Always take Fosfomycin exactly as prescribed by our healthcare professionals.
Who Can Take Fosfomycin?
Fosfomycin may be suitable for adults and female adolescents aged 12 years and over with uncomplicated urinary tract infections. It may not be suitable for everyone, including people with severe kidney impairment, certain allergies, or other medical conditions.
During your online consultation, our GP will assess whether this treatment is appropriate for you.
Possible Side Effects
Like all medicines, Fosfomycin can cause side effects, although not everyone experiences them.
Common side effects may include:
- Diarrhoea
- Nausea
- Headache
- Dizziness
- Indigestion
- Vaginal thrush
Seek urgent medical advice if you experience signs of a severe allergic reaction, persistent diarrhoea, or other serious symptoms.
Important Information
- Prescription-only medicine (POM)
- Suitable only when prescribed by a qualified healthcare professional
- Not effective against viral infections
- Always complete your treatment exactly as directed
- Tell us about any medicines you are taking and any allergies before starting treatment.
Why Choose RapidMeds?
- UK online pharmacy service
- Convenient online consultation
- UK-registered GPs
- Fast, discreet delivery
- Secure ordering process
- Trusted healthcare support
Frequently Asked Questions
How quickly does Fosfomycin start working?
Many people begin to notice improvement within 24 to 48 hours, although symptoms can take a little longer to resolve completely.
Do I need more than one sachet?
For uncomplicated cystitis in women, treatment is commonly a single 3g sachet. Some patients with different types of urinary tract infections may require alternative dosing as determined by their clinician.