This patient should be treated with ketoconazole cream. Scaling and redness, specifically on the eyebrows, nasolabial folds, and sides of the chin, are characteristic of seborrheic dermatitis. The redness and scaling are a response to commensal yeasts in the skin, and topical ketoconazole targets these yeasts. Patients may believe that their skin findings are due to dry skin on the face. However, the redness of the eyebrows and nasolabial folds extending onto the cheeks and chin with scaling is typical of seborrhea and often does not respond to moisturization only.

Benzoyl peroxide is approved for treatment of acne vulgaris, which is characterized by open and closed comedones and inflammatory lesions, but not the redness and scaling associated with seborrheic dermatitis.

Metronidazole is used to treat rosacea, which usually presents with flushing and central facial erythema, telangiectasias, papules, and pustules but not typically with scaling.

Mupirocin is a topical antibiotic that targets gram-positive organisms, but there are no pustules, crusting, bullae, or erosions that would be diagnostic of impetigo in this patient.

Triamcinolone would decrease the inflammatory response and redness of seborrheic dermatitis but is too potent to be used consistently on the face.