Lactulose Side Effects

Possible side effects of lactulose are listed below. Call your doctor for medical advice about these common side effects if they are severe or continue after a few days.

• Nausea
• Gas
• Diarrhea

Other side effects of lactulose can be more serious. Call your doctor right away or seek emergency medical attention if you develop the following serious side effects:

• An unusual or allergic reaction with skin rash, hives, itching
• Stomach cramps or stomach pain
• Vomiting

The above list may not include all the potential adverse effects of lactulose. Contact your healthcare provider if your side effects are unusual or severe or if they do not get better over time. You can also report unusual side effects to the Food and Drug Administration at 1-800-FDA-1088.

Lactulose Overdose: In case of an overdose, call your doctor immediately. You can also call your local poison control center or the national poison control center at 1-800-222-1222. Call 911 if a person has lost consciousness, collapsed, is not breathing, or has had a seizure.

Source: FDA