Duphalac is a type of sugar. It is broken down in the large intestine into mild acids that draw water into the colon, which helps soften the stools.

Duphalac is used to treat chronic constipation.

Duphalac may also be used for other purposes not listed in this medication guide.

What is the most important information I should know about Duphalac?

Before taking Duphalac, tell your doctor if you have diabetes or if you need to have any type of intestinal test using a scope (such as a colonoscopy).

It may take up to 48 hours before you have a bowel movement after taking this medicine.

The liquid form of Duphalac may become slightly darker in color, but this is a harmless effect. However, do not use the medicine if it becomes very dark, or if it gets thicker or thinner in texture.

If you use Duphalac over a long period of time, your doctor may want you to have occasional blood tests. Do not miss any scheduled appointments.

Take this medication exactly as prescribed by your doctor. Do not take it in larger amounts or for longer than recommended. Follow the directions on your prescription label.

Measure liquid medicine with a special dose-measuring spoon or cup, not a regular table spoon. If you do not have a dose-measuring device, ask your pharmacist for one.

The liquid form of Duphalac may become slightly darker in color, but this is a harmless effect. However, do not use the medicine if it becomes very dark, or if it gets thicker or thinner in texture.

Duphalac (lactulose) powder should be mixed with at least 4 ounces of water. You may also use fruit juice or milk to make the medication better.

It may take up to 48 hours before you have a bowel movement after taking this medicine.

If you use Duphalac over a long period of time, your doctor may want you to have occasional blood tests. Do not miss any scheduled appointments.

Store Duphalac at room temperature away from moisture and heat.

Before taking Duphalac, tell your doctor if you have:

• diabetes; or

• if you need to have any type of intestinal test using a scope (such as a colonoscopy).

If you have any of these conditions, you may need a dose adjustment or special tests to safely take Duphalac.

Take the missed dose as soon as you remember. If it is almost time for your next dose, wait until then to take the medicine and skip the missed dose. Do not take extra medicine to make up the missed dose.

Overdose symptoms may include diarrhea, stomach pain, hot and dry skin, confusion, uneven heart rate, extreme thirst, increased urination, leg discomfort, and muscle weakness or limp feeling.

Avoid using antacids without your doctor's advice. Use only the specific type of antacid your doctor recommends. Antacids contain different medicines and some types can make it harder for your body to absorb Duphalac.

Less serious side effects may include:

• bloating, gas;

• stomach pain;

• diarrhea; or

• nausea, vomiting.

This is not a complete list of side effects and others may occur. Tell your doctor about any unusual or bothersome side effect.

There may be other drugs that can interact with Duphalac. Tell your doctor about all your prescription and over-the-counter medications, vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not start a new medication without telling your doctor.