Dandruff (Seborrheic Dermatitis) - Treatment

What Is It?

Step-by-Step Treatment Approach

Mild Dandruff (OTC First-Line)

Moderate-to-Severe Dandruff (Prescription Options)

• Ketoconazole 2% shampoo (Rx): The mainstay of therapy, with a 75-90% response rate in double-blind trials. Use twice weekly initially, then weekly or biweekly for maintenance. Can be lathered onto the scalp and any affected body area. - Dermatology 2-Volume Set 5e, p. 283
• Ciclopirox olamine shampoo: Has both antifungal and anti-inflammatory activity; effective in double-blind randomized trials.
• Ketoconazole 2% cream or gel: For facial seborrheic dermatitis (eyebrows, nasolabial folds). Evidence rating: SOR A. - Textbook of Family Medicine 9e

Add-on Treatments (Adjuncts)

• Low-potency topical corticosteroids (e.g., hydrocortisone 1-2.5%, desonide): Useful in the initial phase to suppress inflammation. Equally efficacious to azoles per Cochrane analysis, but not for long-term use (risk of skin thinning, telangiectasias on the face). - Dermatology 5e, p. 283
• Topical calcineurin inhibitors (tacrolimus, pimecrolimus): Second-line, especially for the face where steroids are risky long-term.
• Emollients: Helpful to soften and loosen thick scales, especially at initial treatment stages.

Severe or Recurrent Cases

• Oral fluconazole or itraconazole: Reserved for severe disease or frequent relapses. Weekly fluconazole is an option for maintenance in refractory cases. - Dermatology 5e, p. 283
• Oral terbinafine 250 mg once daily for 4-6 weeks: Effective for moderate-to-severe SD including hairline and truncal involvement (evidence from a study of 174 patients). - PMC 2025 Narrative Review
• Narrow-band UVB: Level C evidence; used for severe scalp/face SD, though relapse is common.

Infantile Seborrheic Dermatitis (Cradle Cap)

• Usually resolves with gentle bathing and emollients.
• Mild shampoos for scale removal; avoid strong keratolytic agents or mechanical scraping.
• Ketoconazole 2% cream for more extensive/persistent cases.
• Short courses of low-potency topical corticosteroids may suppress inflammation initially. - Dermatology 5e, p. 283

Special Considerations

• HIV, Parkinson's disease, trisomy 21: SD can be severe and difficult to treat. Consider HIV testing in a healthy-appearing patient with severe or new-onset SD. - Tintinalli's Emergency Medicine, p. 1677
• Maintenance is essential: Because Malassezia has a slow proliferation rate, relapses typically appear 2-4 weeks after stopping treatment. A maintenance schedule (e.g., once-weekly medicated shampoo) prevents this.
• Hair washing frequency: Frequent washing reduces yeast load. For high-curl-pattern hair, modified washing schedules with appropriate antifungal products should be tailored to minimize scalp buildup without over-drying. - J Cosmet Dermatol 2026 [PMID: 41998807]

Summary of Treatment Ladder

Mild dandruff
  → OTC zinc pyrithione / selenium sulfide / ketoconazole 1% shampoo

Moderate-severe
  → Ketoconazole 2% shampoo (Rx) ± low-potency topical steroid (short course)
  → Ciclopirox olamine shampoo

Refractory / frequent relapse
  → Oral fluconazole (weekly) or itraconazole
  → Oral terbinafine (4-6 weeks)
  → Narrow-band UVB (specialist referral)