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Guidelines
Pathogens
Antimicrobials
Minor β-lactam reactions
Nonspecific rashes
GI intolerance
Cross reactivity with 2nd, 3rd, and 4th generation cephalosporins is low (<3%)
The benefit from beta-lactam antibiotics outweighs the potential risk in these patients
Serious β-lactam reactions
Anaphylaxis
Angioedema
Breathing problems
Hives
Levofloxacin 750mg PO/IV Q24h*
AND
Metronidazole 500mg PO/IV Q8h*
*This is the preferred regimen in the absence of nursing home residence or prior exposure to a fluoroquinolone in the past six months