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Westhroid Side Effects Center
Medical Editor: John P. Cunha, DO, FACOEP
Westhroid (thyroid) is a hormone used to treat underactive thyroid (hypothyroidism), to treat or prevent goiters, or as a diagnostic agent used in suppression tests to differentiate suspected mild hyperthyroidism or thyroid gland anatomy. Side effects of Westhroid are uncommon. Temporary hair loss may occur during the first few months of treatment with Westhroid. Infrequent side effects of Westhroid include diarrhea, nausea, vomiting, changes in appetite, headache, weight loss, tiredness, changes in menstrual periods, or trouble sleeping.
The usual starting dose of Westhroid to treat hypothyroidism is 32.5 mg, with increments of 16.25 mg every 2 to 3 weeks. Westhroid may interact with oral anticoagulants, insulin or oral hypoglycemic therapy, cholestyramine, colestipol, estrogens, or oral contraceptives. Tell your doctor all medications and supplements you use. Westhroid may be used during pregnancy. Tell your doctor if you are pregnant before starting treatment with Westhroid as your dose may need to be adjusted. Minimal amounts of this drug pass into breast milk. Consult your doctor before breastfeeding.
Our Westhroid (thyroid) Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication.
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.
What is Prescribing information?
The FDA package insert formatted in easy-to-find categories for health professionals and clinicians.
Westhroid FDA Prescribing Information: Side Effects
Additional Westhroid Information
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
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