Selsun Shampoo in Pediatrics
Selenium sulfide 1% shampoo (Selsun) is safe and effective for use in children as an adjunctive treatment for tinea capitis and can be used for dandruff/seborrheic dermatitis, though it should NOT be used as monotherapy for scalp fungal infections.
Primary Indication: Adjunctive Treatment for Tinea Capitis
Selenium sulfide 1% shampoo has demonstrated efficacy in reducing spore transmission when used alongside oral antifungal therapy in children with tinea capitis 1. The British Association of Dermatologists guidelines specifically recommend selenium sulfide 1% shampoo as an adjunctive agent to reduce transmission of fungal spores, though topical therapy alone is insufficient for cure 1.
Dosing for Tinea Capitis
- Apply twice weekly while the child receives oral antifungal therapy (typically griseofulvin or terbinafine)
- Continue until mycological clearance is achieved
- Research demonstrates that 1% selenium sulfide is equally effective as the 2.5% prescription formulation for sporicidal activity 2
Evidence Supporting Use
The evidence is robust: selenium sulfide demonstrates sporicidal activity both in vitro and in vivo. In one study, 15 of 16 children (93.8%) with Trichophyton tonsurans infections had negative cultures at two weeks when using selenium sulfide twice weekly with griseofulvin, compared to persistent positive cultures in children using bland shampoo or other topical agents 3. A more recent randomized trial confirmed that both selenium sulfide 1% and ciclopirox 1% were equally effective as adjuncts, with 90.9% mycological cure rates 4.
Secondary Indication: Dandruff and Seborrheic Dermatitis
Selenium sulfide shampoo can be used in children for dandruff and seborrheic dermatitis, though the evidence base is primarily in adults. The FDA labeling for over-the-counter Selsun Blue products does not specify age restrictions 5.
Dosing for Dandruff/Seborrheic Dermatitis
- Apply 2-3 times per week for active treatment
- Once-weekly maintenance after initial control
- Recent studies show significant improvement within 3-7 days 6, 7
Safety Considerations
Age Limitations
- No specific lower age limit is established in the guidelines or FDA labeling
- Clinical studies have included children as young as 1 year old 4, 2
- The British guidelines reference use in children aged 1 month and older for tinea capitis treatment protocols (though this refers to oral therapy) 1
Important Warnings
Avoid eye contact - if contact occurs, rinse thoroughly with water 5
Scalp discoloration: A notable adverse effect is orange to red-brown scalp discoloration, particularly in children with lighter hair. This is benign and resolves after discontinuation; it can be removed by swabbing with isopropyl alcohol 8. This is a cosmetic issue only and does not indicate toxicity.
For external use only - keep out of reach of children; if swallowed, contact poison control 5
Clinical Algorithm
For tinea capitis (scalp ringworm):
- Confirm diagnosis clinically or with microscopy/culture
- Start oral antifungal therapy (griseofulvin or terbinafine based on suspected organism)
- Add selenium sulfide 1% shampoo twice weekly as adjunctive therapy
- Continue until mycological cure (not just clinical improvement)
- Screen household contacts for T. tonsurans cases
For dandruff/seborrheic dermatitis:
- Apply 2-3 times weekly for 2-4 weeks
- Reduce to once weekly for maintenance if needed
- Expect improvement within the first week
Key Pitfalls to Avoid
- Do not use selenium sulfide as monotherapy for tinea capitis - it reduces spore shedding but does not cure the infection; oral antifungals are mandatory 1
- Do not confuse the 1% OTC formulation with 2.5% prescription strength - both are equally effective for adjunctive use in tinea capitis 2
- Warn parents about potential scalp discoloration - this prevents unnecessary alarm and diagnostic procedures 8
- Do not stop treatment based on clinical improvement alone - continue until mycological clearance is documented 1