Metronidazole 200 mg 100 tab .

The right dosage of metronidazole for your dog depends on the condition being treated and their size. For intestinal tract issues (like diarrhea) or irritable bowel symptoms, vets may prescribe 10 – 15 mg/kg (or about 22 – 33 mg/lb) every 12 hours for several days, depending on the severity. For Giardia, around 25 mg/kg (or 55 mg/lb) every 12 hours for 5 days is recommended.¹