Metronidazole Flagyl For Dogs Side Effects. If you notice any serious side effects with your dogs, rush to the vet immediately. Metronidazole is considered to be safe for dogs when administered properly and rarely causes side effects.
Same as any other drug, metronidazole can cause side effects in dogs. Metronidazole (flagyl) is a popular antibiotic a vet may prescribe for a dog to treat diarrhea, inflammatory bowel disease, or gum disease. In some cases, your dog may experience side effects, including but not limited to: