1 May 2026Oral drugs

Fosfomycin Trometamol Oral: Dosing and Precautions

Fosfomycin guidance for uncomplicated cystitis and asymptomatic bacteriuria in pregnancy, using single-dose therapy.

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Fosfomycin oralFosfomycin trometamol

Prescription under medical supervision

Source reviewed

source date listed on the source page

Guide category

Oral drugs

Safety boundary

Prescription medicine information for clinician-guided use.

Kenza Health Hub presents this medicine page as structured health education. Check dose, route, interactions, pregnancy or breast-feeding considerations, and local protocol with a qualified clinician or pharmacist. Read our medical editorial policy.

This guide page is for structured reference only and does not replace a clinician, pharmacist, or emergency review. Dose choice, route choice, interactions, and safety decisions still need professional judgment.

Therapeutic action

Phosphonic acid derivative antibacterial.

Indications

Acute uncomplicated cystitis in women, without fever nor flank pain.
Asymptomatic bacteriuria in pregnant women.

Forms and strengths

Granules for oral solution in 3 g sachet, to be dissolved in filtered water.

Dose and duration

3 g single dose.

Contra-indications, adverse effects, precautions

Do not administer to patients with severe renal impairment or allergy to fosfomycin.
May cause gastrointestinal disturbances, skin rash, and rarely allergic reactions.
Pregnancy: no contra-indication.
Breast-feeding: no contra-indication.

Source

MSF Essential drugs practical guidelines (January 2026)

This page combines source-derived medicine reference sections with Kenza editorial context, while leaving out the Storage and Remarks sections from the source batch.

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