Allergy to class/drug
Neonates, pregnant women at term or when delivery imminent
Renal failure due to accumulation of metabolites that may cause peripheral neuropathy
CrCL < 60, oliguria, anuria
Cholestatic jaundice history
Nitrofurantoin
Tetracycline
Ciprofloxacin
Penicillin G
Chloramphenicol
Metronidazole
Erythromycin
Gatifloxacin