• Basic Info
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Before taking ursodiol, tell your doctor if you are using any of the following drugs:

• cholestyramine (Questran);

• colestipol (Colestid);

• estrogens (birth control pills or hormone replacement); or

• antacids that contain aluminum, such as Rolaids, Mylanta, or Maalox).

If you are using any of these drugs, you may not be able to use ursodiol or you may need dosage adjustments or special tests during treatment.

There may be other drugs not listed that can affect ursodiol. Tell your doctor about all the prescription and over-the-counter medications you use. This includes vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not start using a new medication without telling your doctor.

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Other less serious side effects are more likely to occur, such as:

• fever, chills, body aches, flu symptoms;

• stomach pain, nausea, diarrhea, constipation;

• dizziness, tired feeling;

• back pain;

• runny or stuffy nose, cold symptoms; or

• headache.

Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.