An adolescent female calls the clinic with concerns that her acne is worse one week after starting topical tretinoin. What would be the appropriate care for her?

Acne treatment with topical retinoids such as Tretinoin commonly causes an initial “purging” phase where lesions may appear worse before improvement occurs. This happens because retinoids increase epidermal cell turnover and promote the expulsion of pre-existing microcomedones. Patients may become discouraged during this early phase and discontinue therapy prematurely. Proper counseling is essential to improve adherence and ensure therapeutic success. Rationale: A. Switching to an oral antibiotic is not indicated at this stage because the initial worsening seen with Tretinoin is not treatment failure but an expected early response. Oral antibiotics are reserved for moderate to severe inflammatory acne or cases that do not respond to topical therapy. Premature escalation exposes the patient to unnecessary systemic antibiotic risks. B. Applying an oil-based lotion is not recommended because it may worsen acne by increasing follicular occlusion. While tretinoin can cause dryness and irritation, non-comedogenic moisturizers are preferred instead of oil-based products. The goal is to reduce irritation without exacerbating acne lesions. C. Reassurance is appropriate because the early flare with Tretinoin is a well-known and temporary effect related to increased skin cell turnover. Continued use typically leads to significant improvement in comedonal and inflammatory acne after several weeks. Patient education helps prevent discontinuation during this expected adjustment period. D. Changing to a different topical agent is unnecessary because this is not an allergic or severe adverse reaction. The initial worsening is an expected pharmacologic response rather than intolerance. Discontinuation or switching therapy too early may prevent the patient from achieving the full therapeutic benefit of tretinoin.