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12.1 Mechanism of Action Levofloxacin is a member of the fluoroquinolone class of antibacterial agents [see Microbiology ( 12.4)].

1 INDICATIONS & USAGE Levofloxacin is a fluoroquinolone antibacterial indicated in adults (18 years of age and older) with infections caused by designated, susceptible bacteria and in pediatric patients where indicated (1, 12.4). • Pneumonia: Nosocomial (1.1) and Community Acquired (1.2, 1.3) • Skin and Skin Structure Infections (SSSI): Complicated (1.4) and Uncomplicated (1.5) • Chronic bacterial prostatitis (1.6) • Inhalational Anthrax, Post-Exposure in adult and pediatric patients (1.7) • Plague in adult and pediatric patients (1.8) • Urinary Tract Infections (UTI): Complicated (1.9, 1.10) and Uncomplicated (1.12) • Acute Pyelonephritis (1.11) • Acute Bacterial Exacerbation of Chronic Bronchitis (1.13) • Acute Bacterial Sinusitis (1.14) Usage To reduce the development of drug-resistant bacteria and maintain the effectiveness of levofloxacin and other antibacterial drugs, levofloxacin should be used only to treat or prevent infections that are proven or strongly suspected to be caused by bacteria (1.15). 1.1 Nosocomial Pneumonia Levofloxacin tablets are indicated in adult patients for the treatment of nosocomial pneumonia due to methicillin-susceptible Staphylococcus aureus, Pseudomonas aeruginosa, Serratia marcescens, Escherichia coli, Klebsiella pneumoniae, Haemophilus influenzae, or Streptococcus pneumoniae. Adjunctive therapy should be used as clinically indicated. Where Pseudomonas aeruginosa is a documented or presumptive pathogen, combination therapy with an anti-pseudomonal β-lactam is recommended [see Clinical Studies ( 14.1) ]. 1.2 Community-Acquired Pneumonia: 7 to 14 day Treatment Regimen Levofloxacin tablets are indicated in adult patients for the treatment of community-acquired pneumonia due to methicillin-susceptible Staphylococcus aureus, Streptococcus pneumoniae (including multi-drug-resistant Streptococcus pneumoniae [MDRSP]), Haemophilus influenzae, Haemophilus parainfluenzae, Klebsiella pneumoniae, Moraxella catarrhalis, Chlamydophila pneumoniae, Legionella pneumophila, or Mycoplasma pneumoniae [see (2.1) and Clinical Studies ( 14.2)]. MDRSP isolates are isolates resistant to two or more of the following antibacterials: penicillin (MIC ≥2 mcg/mL), 2nd generation cephalosporins, e.g., cefuroxime, macrolides, tetracyclines and trimethoprim/sulfamethoxazole. 1....

2 DOSAGE & ADMINISTRATION • Administer Levofloxacin Tablets to pediatric patients weighing 30 kg and greater only (2.1, 2.2). • Levofloxacin Tablets cannot be administered to pediatric patients who weigh less than 30 kg because of the limitations of the available strengths. Alternative formulations of levofloxacin may be considered for pediatric patients who weigh less than 30 kg (2.2). Dosage in Adult and Pediatric Patients with Creatinine Clearance greater than or equal to 50 mL/minute (2.1. 2.2) Type of Infection Dose Every 24 hours Duration (days) Nosocomial Pneumonia (1.1) 750 mg 7 to 14 Community Acquired Pneumonia (1.2) 500 mg 7 to 14 Community Acquired Pneumonia (1.3) 750 mg 5 Complicated SSSI (1.4) 750 mg 7 to 14 Uncomplicated SSSI (1.5) 500 mg 7 to 10 Chronic Bacterial Prostatitis (1.6) 500 mg 28 Inhalational Anthrax (Post-Exposure) (1.7) Adults and Pediatric Patients 50 kg or greater Pediatric Patients 30 kg to less than 50 kg (2.2) 500 mg 250 mg every 12 hours 60 60 Plague (1.8) Adults and Pediatric Patients 50 kg or greater Pediatric Patients 30 kg to less than 50 kg (2.2) 500 mg 250 mg every 12 hours 10 to 14 10 to 14 Complicated UTI (1.9) or Acute Pyelonephritis (1.11) 750 mg 5 Complicated UTI (1.10) or Acute Pyelonephritis (1.11) 250 mg 10 Uncomplicated UTI (1.12) 250 mg 3 Acute Bacterial Exacerbation of Chronic Bronchitis (1.13) 500 mg 7 Acute Bacterial Sinusitis (1.14) 750 mg 5 500 mg 10 to 14 • Adjust dose for creatinine clearance less than 50 mL/minute (2.3, 8.6, 12.3) 2.1 Dosage of Levofloxacin Tablets in Adult Patients with Creatinine Clearance ≥ 50 mL/minute The usual dose of levofloxacin tablets is 250 mg, 500 mg, or 750 mg administered orally every 24 hours, as indicated by infection and described in Table 1. These recommendations apply to patients with creatinine clearance ≥ 50 mL/minute. For patients with creatinine clearance less than 50 mL/min, adjustments to the dosing regimen are required [see ( 2.3 )]....

The most common reactions (≥3%) were nausea, headache, diarrhea, insomnia, constipation and dizziness ( 6.2 ). To report SUSPECTED , contact Hetero Labs Limited at 1-866-495-1995 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch . 6.1 Serious and Otherwise Important The following serious and otherwise important adverse drug reactions are discussed in greater detail in other sections of labeling: • Disabling and Potentially Irreversible Serious [ see (5.1)] • Tendinitis and Tendon Rupture [see ( 5.2)] • Peripheral Neuropathy [see (5.3)] • Central Nervous System Effects [see ( 5.4)] • Exacerbation of Myasthenia Gravis [see ( 5.5)] • Other Serious and Sometimes Fatal Reactions [see ( 5.6)] • Hypersensitivity Reactions [see (5.7)] • Hepatotoxicity [see ( 5.8)] • Risk of Aortic Aneurysm and Dissection [see ( 5.9 )] • Clostridium difficile-Associated Diarrhea [see ( 5.10 )] • Prolongation of the QT Interval [see ( 5.11 )] • Musculoskeletal Disorders in Pediatric Patients [see ( 5.12 )] • Blood Glucose Disturbances [see ( 5.13 )] • Photosensitivity/Phototoxicity [see ( 5.14 )] • Development of Drug Resistant Bacteria [see ( 5.15 )] Crystalluria and cylindruria have been reported with quinolones, including levofloxacin. Therefore, adequate hydration of patients receiving levofloxacin should be maintained to prevent the formation of a highly concentrated urine [see ( 2.5 )]. 6.2 Clinical Trial Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice. The data described below reflect exposure to levofloxacin in 7537 patients in 29 pooled Phase 3 clinical trials. The population studied had a mean age of 50 years (approximately 74% of the population was < 65 years of age), 50% were male, 71% were Caucasian, 19% were Black. Patients were treated with levofloxacin for a wide variety of infectious diseases [see (1)]. Patients received levofloxacin doses of 750 mg once daily, 250 mg once daily, or 500 mg once or twice daily. Treatment duration was usually 3 to 14 days, and the mean number of days on therapy was 10 days. The overall incidence, type and distribution of was similar in patients receiving levofloxacin doses of 750 mg once daily, 250 mg once daily, and 500 mg once or twice daily....

Levofloxacin tablets are contraindicated in persons with known hypersensitivity to levofloxacin, or other quinolone antibacterials [see ( 5.3 )]. Known hypersensitivity to levofloxacin or other quinolones ( 4 , 5.7 )