Used primarily as an antibacterial agent, particularly in topical formulations for the treatment of skin infections and burns. It functions by inhibiting bacterial synthesis of folic acid, which is essential for bacterial growth. Commonly found in combination with other sulfonamides or antimicrobial agents to enhance efficacy against a broad spectrum of gram-positive and gram-negative bacteria. Also utilized in veterinary medicine for treating secondary infections in animals. Its low systemic absorption makes it suitable for localized treatment with minimal risk of systemic side effects.