Two Easy Ways to Start Earning Rewards!
Earn 2X Pals Rewards points at Petco
when you use Petco Pay!
Updated on September 23rd, 2025
Pet's info: Dog | Shih Tzu | Male | neutered | 7 years and 6 months old | 12 lbs
My dog Romeo has consipation and was put on Lactulose. He now has mild diarrhea. What should I do besides stopping Lactulose? He’s playing and eating good. Thank you
2 Answers

Answered By Angel Alvarado, LVT
Licensed Veterinary Technician
Published on August 11th, 2020
Answered By Sara Farmer, DVM
Veterinarian
Published on March 4th, 2017
Lactulose has a wide dose range and can certainly cause diarrhea. I typically recommend adjusting the dose so that the stool is soft but formed like soft serve ice cream. You can try decreasing the lactulose by about 25%. If she is straining at all you should see a veterinarian, because occasionally dogs who are constipated can also pass small amounts of watery stool around the firm stool that is stuck.
1Pet Parents found this answer helpful