Monurol (2 g and 3 g): what it is used for, how to take it and its effects

Monurol is one of the most widely used drugs to treat urinary tract infections, Which includes the bladder, kidneys, urethra and ureters. Some of the most common are cystitis, pyelonephritis, or urethritis, to name a few.

They are usually caused by bacteria that travel from the urethra to the bladder and are more common in women than in men (because the urethra is shorter in them). They are also common in the elderly and in people with different illnesses, Such as diabetes.

Thanks to its bactericidal properties, Monurol is an effective medicine to treat these infections. We will see below what Monurol is, how it works in the body, how it should be administered and finally, its contraindications and side effects.

    What is Monurol and what is it used for?

    Monurol is an antibiotic. As such, it is used to treat infections of the urinary tract or urinary tract (referred to as “UTI” for short). this medicine consists of a chemical with anti-infective properties called “phosphonic acid”. From the latter is derived another substance, “formomethine trometamol”. Formokine trometamol is precisely the active ingredient in Monurol.

    What phosphomycin does is stop the growth of bacteria from slowing down or preventing the synthesis of one of the enzymes essential for its growth. More specifically, it blocks the growth of bacteria responsible for the most common urinary tract infections. Thus, Monurol has a bactericidal property, which helps to relieve uncomplicated urinary tract infections, like cystitis and urethritis.

    This medication is useful for treating uncomplicated bacterial infections, which are those caused by bacteria sensitive to the active ingredient. That is, in the case of severe infections (caused by bacteria highly resistant to formokine trometamol), Monurol will not be an effective medicine, or they will have to adjust the doses depending on the severity of the infection.

    For example, this may be the case with infections presented in the elderly or also in patients who spend a lot of time in bed. Along the same lines, Monurol it is not effective in treating infections not caused by bacteria but by viruses (like the flu).

      Presentation and recommended doses

      Monurol is marketed in sobris containing a water-soluble granule. Its concentration can be 2 or 3 grams and is quickly absorbed. To encourage this, it is recommended that you either not take monurol with food or take it a few hours after the last meal. It can also be taken one hour before ingestion and it is recommended to take it after emptying the bladder. Otherwise, the absorption of Monurol inside our body becomes slower.

      In contrast, the recommended dose for adults with mild infections is usually a single dose (one sachet). The decision to take Mongol 3g or Monurol 2g depends largely on the severity of the infection.

      For the elderly, or in the case of people with severe infections, the general recommendation is to take two doses (2 sachets) on the same day. Again, depending on the severity of the infection, they may administer Mongol 3g or Monurol 2g.

      Once administered, Monurol is expected to have the expected effects within two to three days.. The latter also depends on the person’s medical history (for example, if they had recurrent infections or inflammation in the period before taking Monurol). In fact, it is common for treatment to take a few more days to take effect if there is previous inflammation.


      Monurol is contraindicated for people who have the following conditions:

      • Allergy to the active ingredient (phosphomycin trometamol).
      • Severe kidney disease.
      • In the case of hemodialysis.
      • In children under 6 years old.
      • During the lactation period, Since a small part of the drug is excreted in breast milk. In the period of pregnancy can be administered, although under strict medical supervision.
      • In the case of ordered metoclopramide, this drug may prevent the absorption of phosphomycin trometamol.

      Side effects

      As with all medicines, Monurol produces side effects. These are mild to moderate effects, among which nausea, burning sensation in the chest and diarrhea. Cases of anaphylaxis have been reported on very rare occasions, particularly due to an allergy to the active ingredient.

      Special medical supervision is also necessary for people with diabetes, due to the high content of sucrose in this medicine. If you have ingested more than the recommended dose, it is important to drink water, as phosphomycin trometamol is excreted in the urine.

      Bibliographical references:

      • Lozano, A. (2008). Phosphomycin. Report for the Pharmacy and Therapeutics Commission of the Hospital de Cabueñes. Accessed October 24, 2018.Available at
      • Pigrau, C. (2013). Urinary tract infection. Registered: Madrid.
      • Vademecum (2016). Phosphomycin. Accessed October 24, 2018.Available at

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