My cat had diarrhea, now no poop after Flagyl. When should I worry?

Sometimes when they have diarrhea and haven't eaten as much it takes a few days to build up enough stool to have a proper bowel movement. If he is struggling or straining to poop then yes, I would be concerned. But if he is eating, drinking, not vomiting and acting normally, then I wouldn't be concerned. If he hasn't had a BM by tomorrow morning, I would have your vet take another look at him. I hope this helps!

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 :)

This may not be unusual. Pets with diarrhea will often flush out the distal colon and it can take 2-3 days before the stool is present again in the colon. Make sure Figlio is eating well and acting normal. This is generally a good indication that he is recovering as expected. If he does not have a bowel movement after 3 days or if he seems to be feeling ill again, have him re-examined. Daily walks will help the bowels to move as well. Lastly, make sure he is drinking plenty of water. I hope this helps and that he continues to recover well.

Hello, sorry to hear about Magic. This medication is occasionally given long term and is generally a safe medication. It is originally an antibiotic with some anti-diarrhea and anti-inflammatory properties. Typically, for diarrhea this medication is given for up to 10 days then discontinued. Hope this helps and best of luck.

I am sorry Damian does not feel well. I would recommend recontacting the vet to let them know Damian feels worse. Typically metronidazole works with in 24-48 hours. Typically if he is having liquid diarrhea he is not constipated. I would make sure a fecal is negative for parasites like coccidia. He might need deworming for coccidia since he is you. I would feed him the new food and you can start with a small amount of pedialyte however if he is still not improving I recommend taking him back to a veterinarian for more testing like bloodwork.

It is very common for a cat to not have any bowel movement for a couple of days after having diarrhea because it takes time for stool to build up again in the colon after an episode of diarrhea. I would be concerned if she is straining to defecate without producing any stool, vomiting or not eating. If everything seems normal other than the lack of stool production, then I would just give it a little more time. My guess is that she will pass some stool tonight or tomorrow. If she has not passed stool by tomorrow night, I would have her examined on Friday before going into the weekend. Good luck! I hope that was helpful. Thanks for using Petco Pet Education Center, formerly Petcoach.

Hi and thank you for using PetCoach. I am sorry to hear that Beau is having diarrhea. Since, Beau has only been on metronidazole for one day, I would continue it as it may not have started to work yet. It typically takes 24-48 hours to see any changes. However, if Beau stops eating, is lethargic or has blood in his stool, I would reach out to your veterinarian again and let them know. Beau may need another physical exam or other medications. Here is an article on diarrhea in cats that may be helpful for you and Beau: https://www.petcoach.co/article/diarrhea-in-cats/ Good luck and I hope he feels better soon!