Lactulose Oral Solution 10 g/15-mL 16-oz


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Lactulose is a liquid medication prescribed to soften stools and manage the uncomfortable symptoms of constipation. It can also be used to help support animals who suffer from liver problems. Because it comes in a liquid form, it's easy to administer—simply add it to regular meals or give directly. Customers may receive this drug under the names Enulose, Cephulac, Kristalose.


Lactulose is used as a stool softener to help treat constipation. It has also been used in the treatment of liver disease to help prevent ammonia from building up in the blood.

Possible Side Effects

Diarrhea, loss of appetite, flatulence (increased gas), and cramping have been reported. Gastrointestinal side effects can subside with time. Other side effects may occur. An allergic reaction to Lactulose is possible. Your pet may experience swelling, listlessness, and shock if this occurs. If your pet appears sick in any way after receiving Lactulose, contact your veterinarian immediately. Let your veterinarian know if your pet produces less than 2-3 soft stools per day.

Drug & Food Interactions

Let your veterinarian know about any other medications or supplements your pet is taking before starting Lactulose. Some antibiotics, oral antacids, and other laxatives may interact with Lactulose. Other drug interactions are possible.


This medication should not be used in pets who are hypersensitive to Lactulose. Lactulose may also alter insulin requirements in diabetic pets.

This drug is FDA-approved for human use. However, it is common practice for veterinarians to prescribe such drugs for use in dogs and cats.

NOTE: For Generic Medications, picture displayed may not depict actual product. Generic medications may vary from one order to the next by size, color and shape depending on manufacturer. Customers may receive the same drug under the names Enulose, Cephulac, Kristalose.


Lactulose, Lactose, Sodium Hydroxide, Purified Water.


Recommended Dosage

Use this medication as directed by your veterinarian. If you forget a dose, give it as soon as possible but do not give two doses at the same time.

Storage Instructions

Store at controlled room temperatures of 59° - 86°F. Avoid excessive heat.


What is Lactulose?

This is an oral medication that is used to help manage constipation in cats and dogs. It can also be used to help support pets who suffer from liver problems.

What are the benefits of Lactulose?

  • Liquid formulation allows for easy administration.
  • Softens stools to help ease constipation.
  • Can assist in the management of feline megacolon.
  • Helps reduce chances of hepatic encephalopathy in pets with liver disease.

How is this medication given?

Give this medication by mouth exactly as directed by your veterinarian.

Lactulose is a liquid medication so It may be easiest to deliver it to your pet using a syringe. Some animals may not like the taste of Lactulose (especially cats).

If you are not sure how to give this medication properly, contact your veterinarian for further instructions.

How does this medication work?

Lactulose is the active ingredient that helps to draw water into the stool which helps to increase volume and works to make each stool softer and easier to pass. Lactulose can also prevent the absorption of ammonia from the gut so it can be helpful in the management of liver disease.

What results can I expect?

Lactulose is effective in softening the stools in pets who suffer from constipation. Pets using this medication should pass 2-3 soft stools per day.

Symptoms can return if medication is discontinued.

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