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Monurol: Uses, Side Effects and Dosage

Status:
Prescription (Rx) Facts
Strength:
3 g
ATC code:

Patient Medication Information: uses, side effects, how to take - Monurol

What is MONUROL used for?

MONUROL is an antibiotic medicine used in adult women to treat urinary tract (bladder) infections.

Antibacterial drugs like MONUROL treat only bacterial infections. They do not treat viral infections. MONUROL should be used exactly as directed. Misuse or overuse of MONUROL could lead to the growth of bacteria that will not be killed by MONUROL (resistance). This means that MONUROL may not work for you in the future. Do not share your medicine.

How does MONUROL work?

MONUROL is an antibiotic that kills the bacteria causing the infection. MONUROL starts working to kill bacteria within hours after taking it. The bladder irritation caused by the bacteria and the symptoms that you may be feeling can last for a short time even after the bacteria have been killed.

What are the ingredients in MONUROL?

Medicinal ingredients: fosfomycin tromethamine (equivalent to 3g of fosfomycin)

Non-medicinal ingredients: mandarin and orange flavorings (contain sulphites), saccharin, sucrose

MONUROL comes in the following dosage forms:

Single Dose Sachet: 3 g of powder

Do not use MONUROL if:

  • you are allergic (hypersensitive) to fosfomycin or to any ingredient in this formulation (see What are the ingredients in MONUROL?).

To help avoid side effects and ensure proper use, talk to your healthcare professional before you take MONUROL. Talk about any health conditions or problems you may have, including if you:

  • have kidney problems or are undergoing hemodialysis;
  • have an intolerance to some sugars as MONUROL contains sucrose;
  • are pregnant or planning to become pregnant;

  • are breastfeeding or planning to breastfeed. MONUROL may pass into breastmilk.

Other warnings you should know about:

MONUROL is not related to penicillin or other antibiotics that commonly cause allergic reactions. If you have a history of allergy to antibiotics, tell your healthcare professional before taking MONUROL. Allergic reactions to MONUROL have been reported. Do not take MONUROL if you have previously had an allergic reaction to it.

MONUROL contains sulphites. In rare cases, sulphites can cause serious allergic reactions and severe breathing problems. If you develop symptoms of a serious allergic reaction, such as swollen lips, throat and/or tongue, difficulty breathing, shock, lowered heartbeat, rash or hives, after taking MONUROL get immediate medical help.

Driving and Using Machines: Dizziness has been reported from some patients taking MONUROL which may affect your ability to drive and operate machinery. Do not drive or operate machines until you know how you respond to MONUROL.

Tell your healthcare professional about all the medicines you take, including any drugs, vitamins, minerals, natural supplements or alternative medicines.

The following may interact with MONUROL:

  • probenecid used to treat gout
  • metoclopramide hydrochloride used to treat digestive problems

How to take MONUROL:

  1. 1.

    It is recommended that MONUROL be taken on an empty stomach or at least 2-3 hours after a meal.

  2. 2. Empty entire contents of MONUROL sachet into about 125 mL (½ cup) of cold water and stir to dissolve.
  3. 3. Take immediately after dissolving in water, making sure to drink the complete contents of the glass.

Usual Dose:

One sachet of MONUROL is a complete therapy for treating your bladder infection. Since MONUROL is eliminated in urine over a period of three days, the bacteria in the bladder are killed by MONUROL during this period of time. You should see complete relief or improvement in your symptoms within 2 to 3 days. If your symptoms do not improve by the fourth day, or if you experience repeated (recurrent) infections, you should contact your healthcare professional.

Overdose:

If you think you, or a person you are caring for, have taken too much MONUROL, contact a healthcare professional, hospital emergency department, regional poison control centre or Health Canada's toll-free number, 1-844 POISON-X (1-844-764-7669) immediately, even if there are no signs or symptoms.

Missed Dose:

MONUROL treatment consists of a single dose. If you missed your dose, take it on an empty stomach or at least 2-3 hours after your next meal.

What are possible side effects from using MONUROL?

These are not all the possible side effects you may have when taking MONUROL. If you experience any side effects not listed here, tell your healthcare professional.

Side effects may include:

  • abdominal pain, nausea, upset stomach
  • back pain
  • diarrhea
  • dizziness
  • headache
  • runny nose
  • rash
  • vaginal infection
  • weakness

Serious side effects and what to do about them

Symptom / effectTalk to your healthcare professionalStop taking drug and get immediate medical help
Only if severeIn all cases
UNKNOWN FREQUENCY
Serious Allergic Reaction: swollen lips, throat and/or tongue, difficulty breathing, shock, lowered heartbeat, rash or hives✓
Clostridium difficile colitis (bowel inflammation): persistent or severe bloody or watery diarrhea with or without fever and abdominal pain✓

If you have a troublesome symptom or side effect that is not listed here or becomes bad enough to interfere with your daily activities, tell your healthcare professional.

Reporting Side Effects

You can report any suspected side effects associated with the use of health products to Health Canada by:

  • Visiting the Web page on Adverse Reaction Reporting (https://www.canada.ca/en/health-canada/services/drugs-health-products/medeffect-canada.htmlcanada.ca/drug-device-reporting) for information on how to report online, by mail or by fax; or
  • Calling toll-free at 1-866-234-2345.

NOTE: Contact your health professional if you need information about how to manage your side effects. The Canada Vigilance Program does not provide medical advice.

Storage:

Store at 15°C - 30°C. Keep out of reach and sight of children.

If you want more information about MONUROL:

  • Talk to your healthcare professional
  • Find the full product monograph that is prepared for healthcare professionals and includes this Patient Medication Information by visiting the Health Canada website: (https://www.canada.ca/en/health-canada/services/drugs-health-products/drug-products/drug-product-database.html); the manufacturer’s website (https://knighttx.com), by emailing medinfo@knighttx.com or by calling 1-844-483-5636.

About this document

Source: Health Canada – Drug Product Database (DPD) and product monographs · DIN (Drug Identification Number): 02240335

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The information on this site does not replace the advice of a doctor or pharmacist.

Drug information for Monurol

Rx or OTC
Prescription (Rx)?
DIN 02240335
Schedule(s) PRESCRIPTION
Active ingredient(s) Fosfomycin (fosfomycin tromethamine) 3 G
Dosage form(s) Powder For Solution
Route(s) of administration Oral
Drug class (WHO ATC)
  1. J Antiinfectives for systemic use
    1. J01 Antibacterials for systemic use
      1. J01X Other antibacterials
        1. J01XX Other antibacterials
          1. J01XX01 Fosfomycin
Company KNIGHT THERAPEUTICS INC.
Current status Marketed
Current status date April 1, 2026

Source: Health Canada – Drug Product Database (DPD) and product monographs, data as of November 1, 2026. Data from the Health Canada Drug Product Database, as published there. Not a substitute for the advice of a doctor or pharmacist.