Claritek 250mg tablets are an antibiotic medication containing the active ingredient clarithromycin. It is used to treat various bacterial infections, including respiratory tract infections, skin and soft tissue infections, and certain types of stomach ulcers. The medication works by inhibiting bacterial protein synthesis, thereby preventing the growth and spread of the bacteria. It is important to take Claritek as directed by a healthcare professional, and to finish the entire course of treatment, even if symptoms improve before the medication is finished.