Kitten on metronidazole hasn't pooped in 48 hours. Is this normal?

Question

We are giving our 12 week old kitten metronidazole 25 mg every 12 hours because he more than often has had bright red blood in his stool. The vet prescribed metronidazole saying that it could be parasites. He hasn't had a bowel movement in 48 hours. Does the drug cause constipation, should we stop the meds? Is 48 hours without a bowel movement bad? He is eating very well and his activity level is normal as well. He used to have regular bowel movement (1-2 times a day). Thank you. Pet's info: Cat | Domestic Shorthair | Female | unspayed | 2 months and 22 days old | 3.5 lbs

Jennifer Summerfield, DVM CPDT-KA · Accepted Answer

Hi there. No, metronidazole does not cause constipation. It's normal for a cat to go 2-3 days without a bowel movement if he is getting over diarrhea - it takes time for the intestinal tract to fill up again once the diarrhea is resolved. As long as he is acting normal otherwise (eating and drinking, not vomiting, and not straining to defecate), there should be no cause for concern. He will have a bowel movement when he's ready, probably sometime in the next day or two :)

Kitten on metronidazole hasn't pooped in 48 hours. Is this normal?

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