Why is my puppy's poop dark or constipated after Metronidazole?

Question

Can metrobactin make puppy poo very dark and constapated. Pet's info: Dog | French Bulldog | Male | unneutered | 2 months and 21 days old | 7 lbs

Dr. Strydom, DVM · Accepted Answer

Not typically. Metronidazole does not have any listed side effects like that. Some common side effects are: Nausea or vomiting. Diarrhea. Drooling. Gagging or regurgitation. Loss of appetite. Lethargy or fatigue. Blood or darkening of urine. Fever. So, If the stools are very dark brown that is not really a problem, but black, that is serious and you should call your vet. Black typically means there is bleeding somewhere in the GI tract. If he is straining to defecate he may be constipated but straining can also be from diarrhea (if the stools are very soft/watery). I really don't have quite enough information to be helpful so I think it is probably best if you call your vet. If you want to do a one on one consultation with one our vets where we can chat back and forth then we may be able to help you better.

Why is my puppy's poop dark or constipated after Metronidazole?

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