Azithromycin dihydrate is a formulation of the broad-spectrum macrolide antibiotic azithromycin, commonly used to treat bacterial infections. It works by inhibiting protein synthesis in susceptible bacteria, exerting bacteriostatic activity against a wide range of pathogens. Azithromycin dihydrate offers the convenience of once-daily dosing and a favorable pharmacokinetic profile, making it a popular choice for various respiratory, skin, and soft tissue infections.