Gemifloxacin mesylate is primarily used as an antibiotic to treat bacterial infections. It is effective against respiratory tract infections, including acute bacterial exacerbation of chronic bronchitis and community-acquired pneumonia. The compound works by inhibiting bacterial DNA synthesis, thereby stopping the growth and spread of harmful bacteria. It is often prescribed when other antibiotics are ineffective due to bacterial resistance. Its broad-spectrum activity makes it suitable for targeting a range of gram-positive and gram-negative bacteria. Patients are advised to complete the full course of treatment to ensure the infection is fully eradicated and to prevent the development of antibiotic resistance.