Topical Retinoids in Acne Vulgaris and Acne Scars-From Monotherapy to Combining Regimens

Topical retinoids are the cornerstone of the treatment of multiple dermatological conditions. Long established in acne therapy, they exert effects on keratinization, inflammation, fibroblast activity, and collagen remodeling, suggesting a potential role in both the prevention and treatment of acne scars. This narrative review summarizes current evidence on the use of topical retinoids in acne vulgaris and acne scarring, focusing on different retinoid molecules, formulation technologies, and combination strategies. A review of published clinical and experimental studies evaluating tretinoin, adapalene, tazarotene, and trifarotene was performed, including their use as monotherapy and in combination with other topical agents or procedural interventions. The available data indicate that topical retinoids have a well-established position in acne treatment, can improve the appearance of atrophic acne scars, reduce the progression of scarring, and support skin remodeling. Advances in formulation technologies have improved tolerability, while combination approaches with agents such as benzoyl peroxide, antibiotics or procedural techniques have shown additive or synergistic effects, particularly in more severe cases. Nevertheless, much of the evidence regarding novel formulations is derived from small or heterogeneous study populations. In conclusion, topical retinoids represent a relevant therapeutic option in acne vulgaris and acne scarring, from monotherapy in mild cases to components of multimodal treatment protocols in more severe disease. Further large-scale, comparative studies are needed to better define the optimal clinical use of advanced drug delivery systems for topical retinoids.