Fosfomycin

Fosfomycin
4.77 ratingsReviews
Generic:
Fosfomycin
Indications:
urinary tract infections
Analogs:
Monurol Nitrofurantoin Pivmecillinam Trimethoprim Co Trimoxazole Cefalexin Ciprofloxacin Cefuroxime Levofloxacin Macrobid Norfloxacin
A well-known Canadian brand for fosfomycin is Monurol, while the name Fosfomycin may be less familiar. You can buy Fosfomycin online today at a great price.
In stock: 17 packs
AdultsPregnancyAllergiesDiabetesBreastfeedingChildrenDriving

Dosages

Fosfomycin 3 g

Quantity Price per sachet You save Total price
1 C$57.68 - C$57.68
2 C$52.64 C$10.08 C$105.28
3 C$49.89 C$23.38 C$149.66
4 C$49.04 C$34.58 C$196.14
5 C$48.33 C$46.76 C$241.64
6 C$47.93 C$58.52 C$287.56
7 C$47.44 C$71.68 C$332.08
8 C$47.20 C$83.86 C$377.58
9 C$47.02 C$95.90 C$423.22
10 C$47.08 C$105.98 C$470.82

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 (approximately 24x11x0.7 cm), with no indication of what is inside.

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Shipping Times
Shipping MethodEstimated delivery
Express Free for orders over C$420.00Estimated delivery to Canada: 4-7 days
Standard Free for orders over C$280.00Estimated delivery to Canada: 14-21 days
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Discount Coupons

  • Victoria Day - May 18, 2026 8% VICTORIA8
  • Canada Day - July 1, 2026 10% CANADADAY10
  • Labour Day - September 7, 2026 6% LABOUR6
  • Thanksgiving (Canada) - October 12, 2026 9% THANKS9
  • Boxing Day - December 26, 2026 12% BOXING12

Brand Names

Also known as (by country):
CountryBrand Names
Canada
Monurol

FAQ

A prescription is required to buy fosfomycin from local pharmacies in Canada. Our store policy allows you to order fosfomycin from us without a prescription and have it sent by mail.

Do not save unused sachets for a future urinary infection or give them to someone else. Take unneeded or expired medicine to a pharmacy for safe disposal, following any local take-back instructions.

Do not extend treatment or take an extra 3 g sachet on your own. Persistent or returning urinary symptoms may need reassessment, including consideration of a urine test and a different treatment approach.

Yes. Fosfomycin granules for oral solution are supplied in sachets and can normally travel by mail when kept dry and appropriately protected. On arrival, check that each sachet is intact and dry; store it at 25°C, with permitted excursions from 15°C to 30°C.

Fosfomycin is an antibiotic used mainly for uncomplicated urinary tract infection, also called acute cystitis, in adult women when the bacteria are susceptible. It is not a general treatment for every urinary symptom or every type of infection.

Empty the entire 3 g sachet into water, stir, and drink the solution straight away; do not take the granules dry. For uncomplicated cystitis, the usual adult regimen is one 3 g sachet as a single dose, preferably on an empty stomach, about 2 to 3 hours after food and ideally after emptying the bladder before bedtime.

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 Canadian product information, it is indicated only for uncomplicated urinary tract infection (acute cystitis) in women caused by susceptible strains of Escherichia coli and Enterococcus faecalis. It is not indicated for pyelonephritis (kidney infection) or perinephric abscess.

Fosfomycin

Dosage and Directions

Adults (women 18 years of age and older): one sachet (3 g) taken as a single dose. It can 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 until dissolved. Do not use hot water. Take it right away after dissolving. Do not take it dry.

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

Precautions

  • Do not use more than one single dose to treat one episode of acute cystitis. Repeated daily doses did not improve outcomes and increased side effects.
  • Antibiotic-associated diarrhea: diarrhea can happen with antibiotics. Get 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 passes into human milk; discuss feeding options with your provider.
  • Pediatrics: safety and effectiveness in children 12 years and under have not been established.

Contraindications

Do not use if you have a known hypersensitivity to fosfomycin.

Drug Interactions

  • Metoclopramide (and other drugs that increase gastrointestinal motility) may lower serum concentrations and urinary excretion of fosfomycin.
  • Cimetidine does not affect fosfomycin pharmacokinetics when taken at the same time.
Fosfomycin has been used in Canada since 2017.

Possible Side Effects

In clinical studies, the most common drug-related side effects (>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 temporary lab changes.

Rare serious side effects have been reported after marketing (mostly outside the United States), including angioedema, aplastic anemia, worsening asthma, 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 on the same day. Do not take an extra sachet to make up for a missed dose; contact your prescriber for advice.

In an emergency, call 911. For poison help, contact your provincial poison centre.

Overdose

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

Storage

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

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

Customer questions

Asked by Emily Carter, London (ON), Canada

I am more comfortable reading medicine instructions in English. Will the fosfomycin package leaflet definitely be in English?

Answered by Support team

The leaflet language for the package supplied is not guaranteed. Please check the received package and its label before use; Canadian product information can also be verified through Health Canada's Drug Product Database.

Asked by Marc Beaulieu, Trois-Rivieres, Canada

My order reached Trois-Rivieres during a very cold spell and was outside briefly. What should I check before using the sachets?

Answered by Support team

Check that the outer package and every sachet are dry, unopened, and undamaged. The labelled storage condition is 25°C, with permitted excursions from 15°C to 30°C.

Asked by Priya Nair, Guelph, Canada

I have had a rash from penicillin before. Is fosfomycin related to penicillin?

Answered by Support team
Medical reviewed by Brian Holtry

No. Fosfomycin is a different antibiotic class and a penicillin allergy does not generally mean an allergy to fosfomycin. Do not take it if you have previously had an allergic reaction to fosfomycin itself, and seek urgent care for swelling, breathing trouble, or widespread hives after any dose.

Product specifications

Active ingredientFosfomycin
Drug classAntibiotic
Dosage formGranules for oral solution
Available strengths3 g
RouteOral
StorageStore at 25°C; excursions permitted from 15°C to 30°C. Keep the sachet dry until use.
ATC codeJ01XX01

Regulatory information

Approval StatusThis active ingredient is authorized for human medicinal use in Canada.
Prescription StatusA valid prescription from a licensed healthcare provider is required to dispense fosfomycin granules for oral solution.

More information