What side effects can this medication cause?

Thyroid may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:

• weight loss
• shaking of a part of your body that you cannot control
• headache
• nausea
• vomiting
• diarrhea
• stomach cramps
• hyperactivity
• anxiety
• irritability or rapid changes in mood
• difficulty falling asleep or staying asleep
• flushing
• increased appetite
• fever
• changes in menstrual cycle
• muscle weakness
• temporary hair loss, particularly in children during the first month of therapy

Some side effects can be serious. If you experience any of the following symptoms, call your doctor immediately:

• rash
• difficulty breathing or swallowing
• chest pain
• rapid or irregular heartbeat
• swelling of the hands, feet, ankles, or lower legs
• excessive sweating
• sensitivity or intolerance to heat
• nervousness
• seizure

Thyroid may cause other side effects. Call your doctor if you have any unusual problems while taking this medication.

If you experience a serious side effect, you or your doctor may send a report to the Food and Drug Administration's (FDA) MedWatch Adverse Event Reporting program online at http://www.fda.gov/MedWatch/report.htm  or by phone 1-800-332-1088.