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Generic for Centany · Topical antibiotic ointment · 15g
Mupirocin 2% is a prescription topical antibiotic ointment — not a steroid. It clears the bacteria (mostly Staphylococcus aureus, sometimes Streptococcus) that colonize eczema-prone skin in children and drive impetigo, honey-colored crusting, and infected flares that stop responding to a steroid.
More than 90% of kids with atopic dermatitis carry Staph on their skin, and the bacteria don’t just infect damaged skin — their toxins actively amplify the immune response driving the eczema. Clearing them is part of treating the disease.
Mupirocin blocks an enzyme (isoleucyl-tRNA synthetase) that Staph and Strep need to build proteins. Without it, the bacteria can’t reproduce. The mechanism is unique among antibiotics — no cross-resistance with penicillin, erythromycin, or the antibiotics your child may have taken by mouth.
Applied to the skin, it stays at the surface and shallow epidermis and reaches bactericidal concentrations there. Most superficial infections start improving within 3–5 days; a full course runs 5–10 days.
Mupirocin is FDA-approved for impetigo in children (down to 2 months of age) with strong pediatric trial data. For atopic dermatitis specifically, multiple pediatric RCTs confirm that treating Staph superinfection meaningfully improves eczema severity scores — the bacteria are a disease driver in kids, not a passive bystander.
Decolonization protocols using nasal and body mupirocin have shown reduced flare frequency in children with recurrent Staph-driven eczema. Bleach-bath protocols are a complementary option your clinician may discuss for the same reason.
Not a substitute for the anti-inflammatory treatment — when both infection and inflammation are present, your child will usually still need a steroid or calcineurin inhibitor to treat the eczema itself. Mupirocin clears the bacteria; the steroid quiets the immune response.
Not for indefinite prophylactic use — overuse selects for mupirocin-resistant Staph. Not effective against viruses. If your child develops clustered punched-out blisters, rapid spread, or fever alongside a flare (possible eczema herpeticum), that’s a medical emergency requiring urgent antiviral care, not more mupirocin.
| Traditional | With Fern | |
|---|---|---|
| Doctor appointment | ~30 days to book | 5-hour clinician review |
| Getting the Rx | Separate pharmacy trip | Shipped to your door |
| Cost | Insurance + copays | $35/mo, no insurance |
| Follow-up | Second appointment | Message the care team |
The classic signs of Staph superinfection in kids: honey-colored or yellowish crusting, weeping that looks thicker or yellow-green than usual, skin that’s more painful than itchy, and eczema that stops responding to a steroid that worked before. Fever suggests a bigger problem. If you’re unsure, a photo and a description through Fern is enough for your clinician to assess.
Yes — this is the standard approach when infection is confirmed. Mupirocin treats the bacteria; the steroid treats the inflammation. Apply them at separate times of day (mupirocin morning, steroid evening, for example) unless your clinician specifies otherwise.
5–10 days for active infection, applied three times daily to affected areas. For nasal decolonization (if prescribed as a specific protocol), twice daily for 5 days inside each nostril. Don’t extend beyond 10 days without follow-up — resistance risk climbs with longer courses.
Yes — mupirocin is FDA-approved for impetigo down to 2 months of age and is considered safe for topical use in this age group. Avoid application close to the mouth, since infants who put their hands in their mouths can ingest small amounts.
Recurrent Staph-driven flares deserve a systematic response, not just repeated mupirocin courses. Options your clinician may discuss: decolonization (nasal plus skin), bleach baths, household decolonization if a sibling or parent is a carrier, and optimizing the maintenance eczema plan so barrier function stays strong enough to resist recolonization.
Fern clinicians review every case individually. Most patients hear back in under 3 hours.
Start your child's assessment →This information is for educational purposes only and is not medical advice. Consult with a healthcare provider before starting any treatment.
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