Sulfacetamide is primarily used in the medical field as an antibiotic to treat bacterial infections. It is commonly applied topically to manage skin conditions such as acne, seborrheic dermatitis, and secondary bacterial infections of the skin. In ophthalmology, it is used in eye drops or ointments to treat conjunctivitis and other eye infections caused by susceptible bacteria. Its antibacterial properties help inhibit the growth of bacteria, reducing inflammation and promoting healing. Additionally, it is sometimes combined with other medications, such as sulfur, to enhance its effectiveness in treating acne and other dermatological issues.