If your pet accidentally ingests alcohol, do not give them metronidazole. Like in humans, alcohol and metronidazole should not be mixed. If this happens, contact your vet immediately. In addition, you shouldn't mix metronidazole with avocado or banana. Metrobactin are chicken-flavoured and don't usually need hiding in food, but a small amount of butter, or a dog treat designed to hide pills in may help if your dog doesn't like the taste of Metrobactin.Certain drugs should not be mixed with metronidazole. These include cimetidine, phenobarbital, phenytoin, cyclosporine, and warfarin.