- Clinician Information:
Thyro-Tabs Side Effects Center
Medical Editor: John P. Cunha, DO, FACOEP
Thyro-Tabs (levothyroxine sodium) is a synthetic thyroid hormone supplement used to treat hypothyroidism (low thyroid hormone), to treat or prevent goiter (enlarged thyroid gland) or thyroid nodules. This medication is available in generic form. Common side effects include fatigue, increased appetite, weight loss, heat intolerance, sweating, headache, anxiety, insomnia, tremors, palpitations, diarrhea, vomiting, abdominal pain, hair loss, or irregular menstrual periods.
The average replacement dose of Thyro-Tabs is based on the patient's weight, and is approximately 1.7 mcg/kg/day. Patients over 50 years of age may require less. Doses are adjusted based on the patient's medical condition. Thyro-Tabs may interact with many drugs, including dopamine, glucocorticoids, lithium, iodide, antacids, androgens (testosterone therapy), phenytoin, carbamazepine, beta-blockers, anticoagulants, antidepressants, insulin, growth hormones, and theophylline. Tell your doctor all medications and supplements you use. Current information shows Thyro-Tabs may be used during pregnancy. Tell your doctor if you are pregnant or if you become pregnant because your dose may need to be adjusted. Small amounts of this medication pass into breast milk. Consult your doctor before breastfeeding.
Our Thyro-Tabs (levothyroxine sodium) 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.
Thyro-Tabs FDA Prescribing Information: Side Effects
Musculoskeletal: tremors, muscle weakness;
Pseudotumor cerebri and slipped capital femoral epiphysis have been reported in children receiving levothyroxine therapy. Overtreatment may result in craniosynostosis in infants and premature closure of the epiphyses in children with resultant compromised adult height.
Seizures have been reported rarely with the institution of levothyroxine therapy.
Inadequate levothyroxine dosage will produce or fail to ameliorate the signs and symptoms of hypothyroidism.
Hypersensitivity reactions to inactive ingredients have occurred in patients treated with thyroid hormone products. These include urticaria, pruritus, skin rash, flushing, angioedema, various GI symptoms (abdominal pain, nausea, vomiting and diarrhea), fever, arthralgia, serum sickness and wheezing. Hypersensitivity to levothyroxine itself is not known to occur.
Read the entire FDA prescribing information for Thyro-Tabs (Levothyroxine Sodium) »
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