Acretin C Gel is a topical medication that combines the retinoid tretinoin with the antioxidant vitamin C. Tretinoin works by promoting skin cell turnover and reducing the formation of acne lesions. Vitamin C helps brighten the skin and protect it from environmental damage. This combination gel is commonly used to treat acne vulgaris and improve overall skin texture and tone. It is important to follow the prescribed regimen to achieve optimal results.