Adapen Gel contains Adapalene, a topical retinoid that can help treat closed comedones (whiteheads) and active acne (pimples) by clearing blocked pores and reducing new breakouts. It may also help gradually fade dark spots over time by promoting new skin growth, but results usually take several weeks to become noticeable. This treatment can make your skin more sensitive to the sun and may cause mild dryness or irritation initially, so apply a small amount to the affected areas at night as directed and always use a high SPF sunscreen during the day.