A 28-year-old patient is diagnosed with mild to moderate seborrheic dermatitis affecting the scalp and face. Which of the following topical agents would be the most appropriate first-line treatment?

Explanation

Given the strong association of *Malassezia* species with seborrheic dermatitis, topical antifungal agents like ketoconazole, ciclopirox, or selenium sulfide are considered first-line treatments. They reduce the yeast population and subsequent inflammation. Mild topical corticosteroids can be used for short periods to control inflammation but are not ideal for long-term monotherapy due to potential side effects. Topical calcineurin inhibitors are second-line options, and topical retinoids are generally not used for seborrheic dermatitis.