1 INDICATIONS & USAGE
To reduce the development of drug-resistant bacteria and maintain the effectiveness of levofloxacin tablets, USPand other antibacterial drugs, levofloxacin tablets, USP should be used only to treat or prevent infections that are proven or strongly suspected to be caused by susceptible bacteria. When culture and susceptibility information are available, they should be considered in selecting or modifying antibacterial therapy. In the absence of such data, local epidemiology and susceptibility patterns may contribute to the empiric selection of therapy.
Levofloxacin tablets, USPare indicated for the treatment of adults (18 years of age) with mild, moderate, and severe infections caused by susceptible isolates of the designated microorganisms in the conditions listed in this section.
Culture and susceptibility testing
Appropriate culture and susceptibility tests should be performed before treatment in order to isolate and identify organisms causing the infection and to determine their susceptibility to levofloxacin tablets, USP
[see
Microbiology(12.4)]
. Therapy with levofloxacin tablets, USP may be initiated before results of these tests are known; once results become available, appropriate therapy should be selected.
As with other drugs in this class, some isolates of Pseudomonas aeruginosa may develop resistance fairly rapidly during treatment with levofloxacin tablets, USP. Culture and susceptibility testing performed periodically during therapy will provide information about the continued susceptibility of the pathogens to the antimicrobial agent and also the possible emergence of bacterial resistance.
Levofloxacin USP is a fluoroquinolone antibacterial indicated in adults (18 years of age) with infections caused by designated, susceptible bacteria (
1,
12.4).
Pneumonia: nosocomial (
1.1) and community acquired (
1.2,
1.3)
Acute bacterial sinusitis (
1.4)
Acute bacterial exacerbation of chronic bronchitis (
1.5)
Skin and skin structure infections: complicated (
1.6) and uncomplicated (
1.7)
Chronic bacterial prostatitis (
1.8)
Urinary tract infections: complicated (
1.9,
1.10) and uncomplicated (
1.12)
Acute pyelonephritis (
1.11)
Inhalational anthrax, post-exposure (
1.13)
Plague (
1.14)
1.1 Nosocomial Pneumonia
Levofloxacin tablets,USP areindicated for the treatment of nosocomial pneumonia due to methicillinsusceptible 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 antipseudomonal -lactam is recommended
[see
Clinical Studies (14.1)
].
1.2 Community-Acquired Pneumonia: 7-14 day Treatment Regimen
Levofloxacin tablets, USP areindicated for the treatment of community-acquired pneumonia due to methicillin-susceptible
Staphylococcus aureus,
Streptococcus pneumoniae (including multidrug-resistant
Streptococcus pneumoniae [MDRSP]),
Haemophilus influenzae, Haemophilus parainfluenzae, Klebsiella pneumoniae, Moraxella catarrhalis, Chlamydophila pneumoniae, Legionella pneumophila, or
Mycoplasma pneumoniae [see
Dosage and Administration (
2.1
) and Clinical Studies (
14.2
)].
MDRSP isolates are strains resistant to two or more of the following antibacterials: penicillin (MIC 2 mcg/mL), 2
nd generation cephalosporins, e.g., cefuroxime, macrolides, tetracyclines and trimethoprim/sulfamethoxazole.
1.3 Community-Acquired Pneumonia: 5-day Treatment Regimen
Levofloxacin tablets, USP areindicated for the treatment of community-acquired pneumonia due to
Streptococcus pneumoniae (excluding multi-drug-resistant strains [MDRSP]),
Haemophilus influenzae,
Haemophilus parainfluenzae,
Mycoplasma pneumoniae, or
Chlamydophila pneumoniae [see
Dosage and Administration (2.1)
and
Clinical Studies (14.3)
]
.
1.4 Acute Bacterial Sinusitis: 5-day and 10-14 day Treatment Regimens
Levofloxacin tablets, USP are indicated for the treatment of acute bacterial sinusitis due to
Streptococcus pneumoniae,
Haemophilus influenzae, or
Moraxella catarrhalis [see
Clinical Studies (14.4)]
.
1.5 Acute Bacterial Exacerbation of Chronic Bronchitis
Levofloxacin tablets,USP areindicated for the treatment of acute bacterial exacerbation of chronic bronchitis due to methicillin-susceptible
Staphylococcus aureus,
Streptococcus pneumoniae,
Haemophilus influenzae,
Haemophilus parainfluenzae, or
Moraxella catarrhalis.
1.6 Complicated Skin and Skin Structure Infections
Levofloxacin tablets, USP are indicated for the treatment of complicated skin and skin structure infections due to methicillin-susceptible
Staphylococcus aureus,
Enterococcus faecalis,
Streptococcus pyogenes, or
Proteus mirabilis [see
Clinical Studies (14.5)]
.
1.7 Uncomplicated Skin and Skin Structure Infections
Levofloxacin tablets, USP are indicated for the treatment of uncomplicated skin and skin structure infections (mild to moderate) including abscesses, cellulitis, furuncles, impetigo, pyoderma, wound infections, due to methicillin-susceptible
Staphylococcus aureus, or
Streptococcus pyogenes.
1.8 Chronic Bacterial Prostatitis
Levofloxacin tablets,USP are indicated for the treatment of chronic bacterial prostatitis due to
Escherichia coli,
Enterococcus faecalis, or methicillin-susceptible
Staphylococcus epidermidis [see
Clinical Studies (14.6)]
.
1.9 Complicated Urinary Tract Infections: 5-day Treatment Regimen
Levofloxacin tablets, USP are indicated for the treatment of complicated urinary tract infections due to
Escherichia coli,
Klebsiella pneumoniae, or
Proteus mirabilis [see
Clinical Studies (14.7)]
.
1.10 Complicated Urinary Tract Infections: 10-day Treatment Regimen
Levofloxacin tablets, USP are indicated for the treatment of complicated urinary tract infections (mild to moderate) due to
Enterococcus faecalis,
Enterobacter cloacae,
Escherichia coli,
Klebsiella pneumoniae,
Proteus mirabilis, or
Pseudomonas aeruginosa [see
Clinical Studies (14.8)]
.
1.11 Acute Pyelonephritis: 5 or 10-day Treatment Regimen
Levofloxacin tablets, USP are indicated for the treatment of acute pyelonephritis caused by
Escherichia coli, including cases with concurrent bacteremia
[see
Clinical Studies(
14.7
,
14.8
)]
.
].
1.12 Uncomplicated Urinary Tract Infections
Levofloxacin tablets, USP are indicated for the treatment of uncomplicated urinary tract infections (mild to moderate) due to
Escherichia coli,
Klebsiella pneumoniae, or
Staphylococcus saprophyticus.
1.13 Inhalational Anthrax (Post-Exposure)
Levofloxacin tablets, USPare indicated for inhalational anthrax (post-exposure) to reduce the incidence or progression of disease following exposure to aerosolized
Bacillus anthracis. The effectiveness of levofloxacin tablets, USP arebased on plasma concentrations achieved in humans, a surrogate endpoint reasonably likely to predict clinical benefit. Levofloxacin tablets, USP has not been tested in humans for the post-exposure prevention of inhalation anthrax. The safety of levofloxacin tablets, USP in adults for durations of therapy beyond 28 days or in pediatric patients for durations of therapy beyond 14 days has not been studied. Prolonged levofloxacin tablets, USP therapy should only be used when the benefit outweighs the risk
[see
Dosage and Administration(
2.1
,
2.2
) and
Clinical Studies (14.9)
]
.
1.14 Plague
Levofloxacin tablets, USP are indicated for treatment of plague, including pneumonic and septicemic plague, due to Yersinia pestis (Y. pestis) and prophylaxis for plague in adults and pediatric patients, 6 months of age and older. Efficacy studies of levofloxacin tablets, USPcould not be conducted in humans with plague for ethical and feasibility reasons. Therefore, approval of this indication was based on an efficacy study conducted in animals [
see
Dosage and Administration (
2.1,
2.2) and Clinical Studies (
14.10
)].