lactulose (generic name)

Evalose (brand name)

It helps to treat chronic constipation and to treat or prevent hepatic encephalopathy or coma
(LAK tyoo lose)
Table of Contents
powered by healthline

Average Ratings

What is this medicine?

LACTULOSE (LAK tyoo lose) is a laxative derived from lactose. It helps to treat chronic constipation and to treat or prevent hepatic encephalopathy or coma. These are brain disorders that result from liver disease.

What should I tell my health care provider before I take this medicine?

They need to know if you have any of these conditions:
  • need a galactose-free diet
  • scheduled for surgery
  • an unusual or allergic reaction to lactulose, other sugars, medicines, foods, dyes or preservatives
  • pregnant or trying to get pregnant
  • breast-feeding

How should I use this medicine?

Take this medicine mouth. Follow the directions on the prescription label. Shake well before using. Use a specially marked spoon or container to measure your medicine. Ask your pharmacist if you do not have one. Household spoons are not accurate. Take your doses at regular intervals. Do not take your medicine more often than directed.

You may be directed to take this medicine rectally. If so, you must follow specific directions from your doctor or healthcare professional. Please contact him or her.

Talk to your pediatrician regarding the use of this medicine in children. Special care may be needed.

What if I miss a dose?

If you miss a dose, take it as soon as you can. If it is almost time for your next dose, take only that dose. Do not take double or extra doses.

What may interact with this medicine?

  • antacids
  • neomycin
  • other laxatives

What should I watch for while using this medicine?

This medicine may not produce any result for 24 to 48 hours. Do not take this medicine for longer than directed by your doctor or health care professional.

Drink plenty of water with each dose of this medicine.

What side effects may I notice from receiving this medicine?

Side effects that you should report to your doctor or health care professional as soon as possible:
  • diarrhea

Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):

  • belching, flatulence
  • nausea or vomiting
  • stomach pain or discomfort

Where should I keep my medicine?

Keep out of the reach of children.

This medicine may darken in color under normal storage conditions. This is because of the sugar solution and does not affect the way the medicine works. If the solution becomes extremely dark in color, contact your health care professional before use.

Store at room temperature between 15 and 30 degrees C (59 and 86 degrees F). Do not freeze. Keep container tightly closed. Throw away any unused medicine after the expiration date.

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.

Last Updated: June 23, 2009
Licensed from
Top of page
General Drug Tools
General Drug Tools view all tools
Tools for
Healthy Living
Tools for Healthy Living view all tools
Search Tools
Search Tools view all tools
Insurance Plan Tools
Insurance Plan Tools view all tools

What is a reference number?

When you register on this site, you are assigned a reference number. This number contains your profile information and helps UnitedHealthcare identify you when you come back to the site.

If you searched for a plan on this site in a previous session, you might already have a reference number. This number will contain any information you saved about plans and prescription drugs. To use that reference number, click on the "Change or view saved information" link below.

You can retrieve information from previous visits to this site, such as saved drug lists and Plan Selector information.