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Thyro-Tabs Side Effects Center: Detailed Datasheet

Medically reviewed by Min Clinic Staff | Updated: January 2026
  • Generic Name: levothyroxine sodium
  • Brand Name: Thyro-Tabs

Thyro-Tabs (Levothyroxine Sodium) side effects drug center

 

PROFESSIONAL

CONSUMER

SIDE EFFECTS

 

Thyro-Tabs Side Effects Center

What Is Thyro-Tabs?

Thyro-Tabs (levothyroxine sodium) tablets are L-thyroxine (T4) indicated as replacement therapy in primary (thyroidal), secondary (pituitary), and tertiary (hypothalamic) con genital or acquired hypothyroidism; and as an adjunct to surgery and radioiodine therapy in the management of thyrotropin-dependent well-differentiated thyroid cancer.

What Are Side Effects of Thyro-Tabs?

Common side effects of Thyro-Tabs are primarily those of hyperthyroidism due to therapeutic overdosage including:

  • irregular heartbeats (arrhythmias),
  • heart attack,
  • shortness of breath,
  • muscle spasm,
  • headache,
  • nervousness,
  • irritability,
  • insomnia,
  • Gastrointestinal: diarrhea, vomiting, abdominal cramps, elevations in liver function tests
  • Dermatologic: hair loss, flushing, rash
  • Endocrine: decreased bone mineral density
  • Reproductive: menstrual irregularities, impaired fertility

Seizures have been reported rarely with the institution of levothyroxine therapy.

Adverse Reactions In Children

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.

Hypersensitivity Reactions

Hypersensitivity reactions to inactive ingredients have occurred in patients treated with thyroid hormone products. These include urticaria, pruritus, skin rash, flushing, angioedema, various gastrointestinal 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)

&Copy; Thyro-Tabs Patient Information is supplied by Cerner Multum, Inc. and Thyro-Tabs Consumer information is supplied by First Databank, Inc., used under license and subject to their respective copyrights.