Used primarily in the treatment of bacterial infections, particularly respiratory tract infections such as pneumonia and bronchitis. It exhibits strong activity against both Gram-positive and Gram-negative bacteria, including drug-resistant strains like penicillin-resistant *Streptococcus pneumoniae* and methicillin-resistant *Staphylococcus aureus* (MRSA). Its high tissue penetration makes it effective in lung and skin infections. Also used in treating urinary tract infections and chronic respiratory diseases with bacterial exacerbations. Due to its broad-spectrum coverage and favorable pharmacokinetics, it is often prescribed when other antibiotics fail or resistance is suspected.