Black Box: carcinogenic in mice and rats; avoid unnecessary use; reserved for approved conditions
Allergy to class/drug
Pregnancy (single 2 dose retimen)
Alcohol use within 3 days
Disulfiram use within 14 days
Metronidazole
Tinidazole
Benznidazole
Meropenem
Vancomycin
Nitazoxanide
Gatifloxacin
Ciprofloxacin