Pneumonia: Treatment of hospital-acquired or community-acquired lung infections. Sinusitis: Severe bacterial infection of the sinuses. Complicated Urinary Tract Infections (UTIs): Including kidney infections (pyelonephritis). Skin Infections: Treatment of complicated skin and soft tissue infections (e.g., cellulitis, abscesses). Chronic Bronchitis: Acute worsening of long-term lung inflammation. Prostatitis: Bacterial infection of the prostate gland.

Levofloxacin is a "bactericidal" antibiotic, meaning it kills bacteria directly: DNA Inhibition: It enters the bacterial cell and inhibits two key enzymes: DNA gyrase and topoisomerase IV. Halting Reproduction: These enzymes are essential for bacteria to unfold, repair, and replicate their DNA. Cell Death: Without the ability to manage its DNA, the bacteria cannot multiply and eventually die off, allowing the body's immune system to clear the remaining infection.

Common: Nausea, diarrhea, headache, dizziness, and constipation. Neurological: Sleep problems (insomnia) or "jitters." Photosensitivity: Skin becomes extremely sensitive to sunlight/UV rays (easier to burn). Serious (Black Box Warning): Tendonitis or tendon rupture (specifically the Achilles tendon). CNS Effects: In rare cases, it can cause tremors, anxiety, or confusion.