Is my dog's Metronidazole causing diarrhea or other side effects?
Sorry Jake is having problems. Metronidazole is often used to treat diarrhea in dogs. It is not common for metronidazole to cause vomiting. However, the underlying CAUSE of the diarrhea is usually some form of gastroenteritis which is inflammation of the stomach and intestine. Gastroenteritis often includes vomiting and can occur for many reasons including:
bacterial imbalance,
viral infections such as parvovirus (Jake is too old for this to be a concern)
ingesting non-food items such as trash or mulch
inflammatory bowel disease
cancer in the GI tract
intestinal parasites
At higher doses, metronidazole can cause "grogginess" or an unsteady gait. If he is showing those signs, discontinue the metronidazole.
Correct, I would hold off on Pepto, but Pepcid AC is fine.
I hope I've answered your questions, and I apologize that we did not get to your question sooner. Please feel free to post again if you still have questions or concerns with Jake.
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Updated on September 23rd, 2025