At a glance
- Class: phosphonic acid derivative; interferes with bacterial cell-wall formation.
- Activity spans some Gram-positive and Gram-negative bacteria, but susceptibility varies.
- Oral and intravenous products are not interchangeable treatment instructions.
- Ask about side effects, other medicines and the precise product you have.
What it is and how it works
Fosfomycin stops an early step in making a bacterial cell wall. It can be active against several kinds of bacteria, but “broad” activity does not tell you if it will work for a particular infection.
Clinicians consider the suspected bacterium, resistance, infection site and the specific formulation.
Forms, uses and possible effects
An oral powder preparation is used for some lower urinary tract infections, and intravenous products are available in certain countries for specialist indications. Availability and approved uses differ by region.
Digestive upset, including diarrhoea or nausea, can occur. Check your own leaflet for complete precautions and contact a pharmacist or clinician if something concerns you.
Research and responsible use
The former AIDA project investigated fosfomycin alongside nitrofurantoin in clinical research on lower urinary tract infections. This is historical context, not advice on choosing between the two medicines.
Do not use leftover fosfomycin for new symptoms. Appropriate selection helps protect the effectiveness of antibiotics.
Sources
Original references- MedlinePlus · Fosfomycin
- European Commission CORDIS · AIDA project record (278348)
- NHS · Antibiotics overview
- CDC · Antibiotic do’s and don’ts
These sources informed this overview. Their organisations do not endorse or review this website.
This page is for general education only. It does not replace advice from a doctor, pharmacist or other qualified healthcare professional. Read our medical disclaimer.