Antibiotics · Sulfamethoxazole/trimethoprim
Co-trimoxazole
Dose
PJP treatment: 15–20 mg/kg/day trimethoprim IV/PO in 3–4 divided doses × 21 days. Prophylaxis: 960 mg OD or thrice weekly.
Use
Pneumocystis pneumonia, nocardiosis, PJP prophylaxis, MRSA soft-tissue infection.
Monitoring
Potassium, creatinine, FBC, rash; add steroids if PaO₂ <70 mmHg in PJP.
Side effects
- • Hyperkalaemia
- • Rash / SJS
- • Marrow suppression
- • Creatinine rise (benign)
Always confirm dose against your local formulary / BNF before prescribing.
