Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Stop using Welchol and call your doctor at once if you have:
severe constipation;
severe stomach pain; or
pancreatitis--severe pain in your upper stomach spreading to your back, nausea and vomiting.
Common side effects may include:
constipation;
nausea; or
upset stomach.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
 Welchol side effects (more detail)
