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Cat constipation: Lactulose failed. Is Miralax safe? Pumpkin?

Updated On September 23rd, 2025

Pet's info: Cat | Domestic Shorthair | Male | neutered | 7 years and 2 months old | 8 lbs

If lactulose is not working for feline constipation is it safe to give my cat 1/8 teaspoon of miralax, mixed in water) for constipation? I had changed his food to a high fiber (Royal Canin) special blend, but he recently is not eating that food. Right now he is eating wet food, and occasionally dry food. He has been cleaned out manually three times in the last 10 months. In regards to the pumpkin puree, could I delute that with water and syringe him with that? Just about at wits end!

1 Answer

Most Helpful Answer

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Answered By Joy Fuhrman, DVM, MBA, CPA

Veterinarian

Published on July 23rd, 2017

It sounds like Jo Jo has megacolon given that he has been manually cleaned out three times. If this is the case, please do not give Jo Jo any Miralax since it is contraindicated in animals with this condition. The best treatment for constipation is to feed an appropriate diet and to encourage activity. You can absolutely dilute the pumpkin puree in water and syringe feed or you may want to try a low residue producing diet. Lactulose and possibly glycerin suppositories are appropriate medical treatments. You may also want to speak with your veterinarian about medications such as cisapride that stimulate colonic motility.

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