How to Write a Mupirocin (Bactroban) Prescription
For a localized bacterial skin infection in an adult, prescribe mupirocin 2% ointment or cream, 15-gram tube, apply a small amount to the affected area three times daily for 10 days, with the treated area optionally covered by gauze dressing. 1
Prescription Format
Rx: Mupirocin 2% ointment (or cream)
- Dispense: 15 grams (one tube)
- Sig: Apply a small amount to affected area three times daily for 10 days
- Refills: 0
Key Prescribing Details
Formulation Selection
- Both ointment and cream formulations contain 2% mupirocin and are FDA-approved for topical bacterial skin infections 1
- The cream formulation uses mupirocin calcium in a water-miscible base, while the ointment uses mupirocin in a polyethylene glycol vehicle 1
- Neither formulation should be used on mucosal surfaces 1
Application Instructions
- Apply three times daily for 10 days as the standard treatment duration 1
- A small amount is sufficient for each application 1
- The treated area may be covered with gauze dressing if desired 1
- For external use only; avoid contact with eyes 1
Clinical Monitoring
- Patients should be re-evaluated if no clinical response is seen within 3 to 5 days 1
- Instruct patients to stop medication and contact their provider if irritation, severe itching, or rash occurs 1
- Recent studies confirm therapeutic response rates exceeding 99% when assessed using validated wound severity scales 2
Important Clinical Considerations
Spectrum of Activity
- Mupirocin demonstrates excellent activity against Staphylococcus aureus (including MRSA) and most streptococci, the primary pathogens in superficial skin infections 3, 2
- Clinical cure or improvement rates consistently exceed 90% in controlled trials 3, 4, 5
Special Populations
- Safe for pediatric use in children ≥3 months of age with no dosage adjustment required 1
- Pregnancy Category B: may be used during pregnancy if clearly needed 1
- Exercise caution in nursing mothers as excretion in breast milk is unknown 1
- No dosage adjustment needed for geriatric patients 1
Common Pitfalls to Avoid
- Do not prescribe for prolonged use beyond 10 days, as this may result in overgrowth of nonsusceptible organisms including fungi 1
- Avoid concurrent application with other topical products, as drug interactions have not been studied 1
- Do not use for deep or extensive infections requiring systemic antibiotics 6
Role in MRSA Decolonization
- For recurrent S. aureus infections, consider a 5-day decolonization regimen with intranasal mupirocin twice daily, combined with daily chlorhexidine washes and decontamination of personal items 6
- Mupirocin remains highly effective for MRSA nasal decolonization despite emerging resistance patterns 7
Resistance Considerations
- Mupirocin's unique mechanism (inhibition of isoleucyl-tRNA synthetase) results in minimal cross-resistance with other antibiotic classes 4, 7
- High-level resistance mediated by mupA and mupB genes is increasingly reported globally, making judicious use essential 7
- Recent data from China shows continued low resistance rates in clinical practice 8