RESUMEN
BACKGROUND: Seborrheic dermatitis is a common chronic, relapsing inflammatory skin condition occurring most often on the face, scalp and chest.OBJECTIVE: To compare the efficacy and safety of 10% guava extract shampoo versus 2% ketoconazole shampoo and clobetasol 0.05% shampoo in the treatment of scalp seborrheic dermatitis.METHODS: Forty-five patients clinically diagnosed with scalp seborrheic dermatitis were randomized to one of the three treatment groups: 10% guava extract shampoo, 2 % ketoconazole shampoo and 0.05% clobetasol shampoo. Patients were followed-up weekly for two weeks to assess the Seborrheic Area Severity Index (SASI) scores, pruritus score, patient's global assessment of improvement and adverse events.RESULTS: After two weeks of treatment, there was no significant difference in the three groups in terms of the mean change in SASI scores (p= 0.46, ANOVA), pruritus scores and in the patient's global assessment of improvement, and frequency of adverse events.CONCLUSION: 10% guava extract shampoo is a safe and effective alternative treatment for scalp seborrheic dermatitis.