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Table 5 Scenario 2: Cumulative fraction of response (CFR) for achieving conservative* pharmacodynamic indice exposures for prescribed antimicrobial regimens against outpatient respiratory isolates

From: Pharmacodynamic evaluation of commonly prescribed oral antibiotics against respiratory bacterial pathogens

ANTIBIOTIC

Dosing Regimen

S. pneumoniae

H. influenzae

M. catharralis

AMOXICILLIN

875 mg BID

95.5%

86.9%

14.6%

AMOXICILLIN

500 mg TID

96.3%

87.8%

14.8%

AMOXICILLIN-CLAVULANIC ACID

875 mg BID

95.5%

97.8%

99.7%

AMOXICILLIN-CLAVULANIC ACID

500 mg TID

96.3%

99.4%

100.0%

AZITHROMICIN

1000 mg QD

91.8%

99.2%

100.0%

AZITHROMICIN

500 mg QD

91.3%

67.9%

99.9%

CEFACLOR

750 mg BID

58.6%

--

--

CEFACLOR

500 mg BID

45.5%

--

--

CEFACLOR

375 mg BID

35.4%

--

--

CEFACLOR

250 mg BID

22.0%

--

--

GATIFLOXACIN

400 mg QD

100.0%

100.0%

100.0%

LEVOFLOXACIN

500 mg QD

51.4%

100.0%

100.0%

LEVOFLOXACIN

250 mg QD

6.6%

100.0%

100.0%

MOXIFLOXACIN

400 mg QD

100.0%

100.0%

100.0%

  1. * Beta-lactams = 30% fT > MIC; Azithro = total AUC/MIC ≥ 10; Fluoroquinolones fAUC/MIC ≥ 33.7