Fosfomycin

Fosfomycin
4.85 ratingsReviews
Generic:
Fosfomycin
Indications:
urinary tract infections
Analogs:
Monurol Nitrofurantoin Pivmecillinam Trimethoprim Co Trimoxazole Cefalexin Ciprofloxacin Cefuroxime Levofloxacin Macrobid Norfloxacin
Buy a 3 g fosfomycin antibiotic sachet with fast delivery. It's one option for treating UTIs. New customers can request a coupon by contacting our support team.
In stock: 17 packs
AdultsPregnancyAllergiesDiabetesBreastfeedingChildrenDriving

Dosages

Fosfomycin 3 g

Quantity Price per sachet You save Total price
1 $46.00 - $46.00
2 $40.00 $12.00 $80.00
3 $38.00 $24.00 $114.00
4 $37.25 $35.00 $149.00
5 $36.80 $46.00 $184.00
6 $36.33 $58.00 $218.00
7 $36.00 $70.00 $252.00
8 $36.13 $79.00 $289.00
9 $35.67 $93.00 $321.00
10 $35.70 $103.00 $357.00

Manufacturers

Zambon S.p.A.

Payment & Shipping

Package Example

Your order is carefully packed and ships within 24 hours. Here is what a typical package looks like.

Sized like a regular personal letter (9.4x4.3x0.3 inches), with no indication of what is inside.

Front View
Front View
Side View
Side View
Back View
Back View
Shipping Times
Shipping MethodEstimated delivery
Express Free for orders over $300.00Estimated delivery to the U.S.: 4-7 days
Standard Free for orders over $200.00Estimated delivery to the U.S.: 14-21 days
EMSUSPS
Payment Methods
VisaMastercardAmerican ExpressDiscoverBitcoin, USDTApple PayGoogle PayPayPal

Discount Coupons

  • Independence Day - July 4, 2026 10% JULY410
  • Labor Day - September 7, 2026 7% LABOR07
  • Thanksgiving - November 26, 2026 9% THANKS09

Brand Names

Also known as (by country):
CountryBrand Names
United States
Monurol

FAQ

A prescription is required to obtain fosfomycin from local pharmacies in the United States. AntiInfectiveMeds allows customers to order this product without a prescription under its store policy and have it sent by mail. Our store policy is separate from the medicine's US prescription-only classification.

For uncomplicated bladder infection, fosfomycin 3 g granules are commonly prescribed as one single dose, so there is not usually a multiday course to stop early. Do not take an additional sachet simply because symptoms remain or recur unless a clinician has specifically instructed it.

If the planned single dose was missed, take it when remembered unless the prescriber gave a specific timing schedule, such as around a procedure. Do not take two sachets together to make up for a missed dose. Ask the prescriber or pharmacist for instructions if the timing is uncertain.

The 3 g oral granules are supplied in sachets and can normally travel by mail when protected from moisture and handled appropriately. Keep each sachet dry and store it at 77°F; temperature excursions from 59°F to 86°F are permitted. On arrival, check that the sachet is dry, intact, and within its expiration date before use.

Fosfomycin is an antibiotic used mainly for urinary tract infections. Oral 3 g fosfomycin is commonly used as a single-dose treatment for uncomplicated acute cystitis, particularly in women, when the suspected or confirmed bacteria are susceptible. It is not appropriate for every urinary symptom or every type of UTI.

Empty the entire sachet into 3 to 4 oz of water, stir, and drink the solution right away. Do not take the granules dry. For uncomplicated cystitis, the usual adult regimen is one 3 g sachet as a single dose, often taken on an empty stomach, preferably at bedtime after emptying the bladder.

Description

Note: Images in the description are provided for informational purposes and may differ from the actual appearance of the product. Please refer to the product name, strength, ingredients, and dosage form.

Fosfomycin 3 g Sachet (Granules for Oral Solution)

Fosfomycin (fosfomycin tromethamine) is a single-dose oral antibiotic supplied as granules for oral solution. In the U.S. labeling, it is indicated only for the treatment of uncomplicated urinary tract infection (acute cystitis) in women due to susceptible strains of Escherichia coli and Enterococcus faecalis. It is not indicated for the treatment of pyelonephritis (kidney infection) or perinephric abscess.

Fosfomycin

Dosage and Direction

Adults (women 18 years of age and older): one sachet (3 g) taken as a single dose. It may be taken with or without food.

How to take: Pour the entire contents of the sachet into 3 to 4 ounces of water (1/2 cup) and stir to dissolve. Do not use hot water. Take immediately after dissolving. Do not take it in its dry form.

Your symptoms should improve in about 2 to 3 days. If symptoms do not improve, contact your health care provider.

Precautions

  • Do not use more than one single dose to treat a single episode of acute cystitis. Repeated daily doses did not improve outcomes and increased adverse events.
  • Antibiotic-associated diarrhea: diarrhea can occur with antibiotics. Seek medical advice right away if you develop watery or bloody stools (with or without stomach cramps and fever), even up to 2 months after taking the dose.
  • Pregnancy: use during pregnancy only if clearly needed. Breastfeeding: it is not known whether fosfomycin tromethamine is excreted in human milk; discuss feeding options with your provider.
  • Pediatrics: safety and effectiveness in children 12 years and under have not been established.

Contraindications

Contraindicated in patients with known hypersensitivity to fosfomycin.

Drug Interaction

  • Metoclopramide (and other drugs that increase gastrointestinal motility) may lower serum concentrations and urinary excretion of fosfomycin.
  • Cimetidine does not affect fosfomycin pharmacokinetics when coadministered.

Possible Side Effect

In clinical studies, the most common drug-related adverse reactions (>1%) were diarrhea, vaginitis, nausea, headache, dizziness, asthenia, and dyspepsia. Other events reported in clinical trials included rhinitis, back pain, dysmenorrhea, pharyngitis, abdominal pain, rash, and transient lab changes.

Rare serious adverse events have been reported in post-marketing experience (mostly outside the United States), including angioedema, aplastic anemia, asthma exacerbation, cholestatic jaundice, hepatic necrosis, and toxic megacolon; during post-marketing surveillance, anaphylaxis and hearing loss have also occurred.

Fosfomycin

Missed Dose

This product is taken as a single dose. If you forget to take it, take it as soon as you remember the same day. Do not take an extra sachet to make up for a missed dose; contact your prescriber for advice.

Overdose

Events observed in patients who have taken fosfomycin in overdose include vestibular loss, impaired hearing, metallic taste, and a general decline in taste perception. In the event of overdose, treatment should be symptomatic and supportive. Seek urgent medical help if an overdose is suspected.

Storage

Store at 77°F (25°C); excursions permitted to 59-86°F (15-30°C). Keep out of the reach of children.

Medically reviewed by
Donna Brettler
BPharm, MPH - Pharmacologist and medical writer
Updated August 11, 2026

Customer questions

Asked by David M, Los Angeles, United States

I've taken fosfomycin before, but it was prepared as a drink. What form do you sell?

Answered by Support team

We offer fosfomycin as 3 g granules for oral solution in sachets. Empty the sachet into water to prepare the dose; we do not list another dosage form for this product.

Asked by Daniel Brooks, Chicago, United States

I found a generic fosfomycin offer for about half the price at another online store. Why should I order from you instead?

Answered by Support team

We stand behind the quality of the generic medicines we offer. We cannot verify what another seller supplies, how it is sourced or handled, or whether a lower-priced offer is truly comparable in manufacturer, origin, and product quality. The choice is yours, but it is worth deciding whether the savings justify accepting those unknowns.

Asked by Erica Johnson, Nashville, United States

I drive for work. Can I drive after taking a fosfomycin sachet?

Answered by Support team
Medical reviewed by Brian Holtry

Most people can drive, but fosfomycin can cause dizziness in some people. Wait to see how you feel after the dose, and do not drive or operate machinery if you feel dizzy or otherwise impaired.

Product specifications

Active ingredientFosfomycin
Drug classAntibiotic
Dosage formGranules for oral solution
Available strengths3 g
RouteOral
StorageStore at 77°F; excursions permitted to 59°F to 86°F. Keep the sachet dry until use.
ATC codeJ01XX01

Regulatory information

Approval StatusFosfomycin is approved by the FDA for human medicinal use in the United States.
Prescription RequirementFosfomycin in oral granule form is a prescription-only medication requiring an order from a licensed healthcare provider.

More information