Used primarily as an antibiotic to treat bacterial infections, especially in patients allergic to penicillin. Commonly prescribed for respiratory tract infections, skin infections, and ear infections. Also effective in treating certain sexually transmitted infections like chlamydia. Often used in pediatric patients due to its favorable taste and formulation options such as suspensions. Helps manage conditions like acne when used long-term and can be part of combination therapy for Helicobacter pylori eradication. Its oral bioavailability and tissue penetration make it suitable for outpatient treatment of mild to moderate infections.