Tetracycline is a broad-spectrum antibiotic used to treat various bacterial infections. It works by inhibiting protein synthesis in bacteria, effectively stopping their growth. Commonly prescribed for conditions like acne, respiratory infections, and urinary tract infections, it is available in oral and topical forms. This antibiotic belongs to the tetracycline class, which includes other medications like doxycycline and minocycline. While generally effective, it can cause side effects such as gastrointestinal discomfort and photosensitivity. It is important to complete the prescribed course to prevent antibiotic resistance.