Lactulose (By Mouth)

Lactulose (LAK-tyoo-lose)

Treats constipation. Also treats problems caused by liver disease.

Brand Name(s):

Kristalose, Generlac, Constulose, Enulose, Cholac, Constilac
There may be other brand names for this medicine.

When This Medicine Should Not Be Used:

Avoid using lactulose if you are following a lactose-free diet.

How to Use This Medicine:

Liquid

• Your doctor will tell you how much to take and how often.
• To make this medicine taste better, you may mix it with about one-half glass of water, milk, or fruit juice.

If a dose is missed:

• Take the missed dose as soon as possible.
• If you do not remember the missed dose until the next day, skip the missed dose and go back to your regular dosing schedule.
• You should not use two doses at the same time.

How to Store and Dispose of This Medicine:

• Store at room temperature in a tightly closed container, away from heat or direct light. Do not freeze.
• Keep all medicine out of the reach of children.

Drugs and Foods to Avoid:

Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.

• Your doctor may tell you to change your diet to include whole grains, bran, fruit, and green leafy vegetables.
• It is best to avoid certain types of antacids, such as Maalox® or Mylanta®. Check with your doctor or pharmacist.

Warnings While Using This Medicine:

• If you are pregnant or breastfeeding, talk to your doctor before taking this medicine.
• When you first take lactulose, it may take 24 to 48 hours before you have a normal bowel movement.
• Make sure your doctor knows if you have diabetes before taking this medicine.
• Make sure your doctor knows you are taking lactulose if you have any medical tests or surgery on your colon or rectum.

Possible Side Effects While Using This Medicine:

Call your doctor right away if you notice any of these side effects:

• Severe or non-stop diarrhea
• Stomach pain or cramps
• Vomiting

If you notice these less serious side effects, talk with your doctor:

• Nausea
• Gas or burping
• Diarrhea
• Loss of appetite

If you notice other side effects that you think are caused by this medicine, tell your doctor.