Clarithromycin 500 mg is a macrolide antibiotic used to treat various bacterial infections. It works by inhibiting bacterial protein synthesis, thereby preventing bacterial growth. This medication is effective against respiratory tract infections (such as pneumonia and bronchitis), skin and soft tissue infections, and Helicobacter pylori-associated peptic ulcers. Clarithromycin 500 mg is typically taken orally, with or without food, and is available in tablet form. Common side effects include gastrointestinal disturbances, headache, and taste alterations. It is important to complete the full prescribed course to prevent antibiotic resistance. Consult a healthcare provider before use, especially if there are underlying health conditions or concerns.