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Is lactulose safe for my overweight cat's constipation, teeth, and weight?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Female | 15 lbs

my 15 yearold overweight cat has constipation problems. Have been giving her lactulose on wet food which helps a lot but is very sugary and sticky and I am concerned if this is bad for her teeth and weight. My vet mentioned Crystalose which he thought could be sprinkled on her food but I can't find much about it. Do you have any suggestions? I tried Miralax which helped but not as well as lactulose. If not kept regular she has very painful episodes of constipation. Thank you .... Susan

1 Answer

Most Helpful Answer

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Answered By Andrea M. Brodie, DVM

Veterinarian

Published on December 28th, 2018

While lactulose is a type of sugar, it will not make your cat overweight and it will also not damage your cat's teeth. Your kitty actually should lose some weight which will help with the constipation as well. If lactulose is working resolving the constipation then I would keep using it. Also make sure her water bowl is at least 5 feet away from the food bowl as cats do not like to drink water near their food.

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