<unk> (oral) is a anti-infective agent, antiparasitic and antiprotozoal agent that is FDA approved for the treatment of symptomatic and asymptomatic trichomoniasis, amebiasis, anaerobic bacterial infections. There is a Black Box Warning for this drug as shown here.  Common adverse reactions include abdominal discomfort, abnormal taste in mouth, diarrhea, nausea, Jarisch Herxheimer reaction, dizziness, headache, candida infection of genital region, vaginal discharge, vaginal irritation, vaginitis.
Metronidazole 
Secnidazole
Clomidazole
Propenidazole
Tinidazole
Benznidazole
Meropenem
Ornidazole