Table 1 2007 Infectious Diseases Society of America/American Thoracic Society Guideline Recommendations for empirical therapy for community-acquired pneumonia

Inpatients, non-ICU treatment

A respiratory fluoroquinolone^a

A nonantipseudomonal β-lactam^b plus a macrolide^c

Inpatients, ICU treatment

A nonantipseudomonal β-lactam^b plus either azithromycin or a respiratory fluoroquinolone^a

If Pseudomonas is a concern

An antipneumococcal, antipseudomonal β -lactam^d plus either ciprofloxacin or levofloxacin

or

The above β-lactam plus an aminoglycoside^e and azithromycin

or

The above β-lactam plus an aminoglycoside^e and a respiratory fluoroquinolone^a