Azithromycin is a broad-spectrum antibiotic that belongs to the macrolide class. It is commonly used to treat various bacterial infections, including respiratory infections (such as bronchitis or pneumonia), ear infections, skin infections, sexually transmitted infections (like chlamydia), and certain gastrointestinal infections caused by bacteria. Azithromycin works by inhibiting bacterial protein synthesis, thereby stopping bacterial growth.

It is often prescribed as a short course of treatment, and its extended half-life allows for fewer doses compared to other antibiotics. Azithromycin is usually well-tolerated, though side effects can include nausea, diarrhea, abdominal pain, and in rare cases, allergic reactions or heart-related side effects. It is important to take the full course of the medication, even if symptoms improve, to prevent bacterial resistance and ensure full recovery. Always consult with a healthcare provider before starting or stopping any antibiotic treatment.