• Miralax (PEG 3350) is commonly used in cats with constipation, and Colace (docusate) is also an option. Oil- or grease-based laxatives like Laxatone should only be used if a vet recommends them and should not be used long-term, as they can affect a cat's ability to absorb nutrients from their food.


  • In humans this product is known to cause flatulence and GI cramping. Recently PEG containing laxatives (Miralax) have been recommended for use in cats. In humans PEG laxatives have been shown to be safe and effective with few adverse side effects. Rarely severe hyponatremia has been reported because of SIADH.

    Also, how much MiraLAX is safe for a cat? PEG 3350 is available as a powder meant to be mixed in liquids for human use (MiraLAX). A suggested dose for cats is 1/8 to 1/4 tsp.

    Likewise, how long does it take for MiraLAX to work in cats?

    How to Use MiraLAX and What to Expect. How long does it take for MiraLAX to work? MiraLAX generally produces a bowel movement in 1 to 3 days. Because it works naturally with the water in your body without causing harsh side effects, you do not need to worry about sudden urgency.

    What laxative is safe for cats?

    Cat laxative gels Lax aire and Laxatone are lubricant-type laxative oral gels that are safe and effective as a preventive and treatment for cat constipation. Mineral oil and olive oil are not recommended due to the danger of inhaling mineral oil and the high dose of fat in olive oil causing digestive upset.

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