About liothyronine sodium
Synthetic thyroid hormone (T3)
Used for
- Treats hypothyroidism, replacing low thyroid hormone.
- Used in selected cases of thyroid hormone suppression testing.
Usual adult dose
Hypothyroidism: usually 25–75 mcg once daily, adjusted gradually according to thyroid tests and response.
Usual dose in children
Individualized by age and weight; typically starts at 5–20 mcg daily in children, with gradual adjustment.
Common side effects
- Fast or irregular heartbeat
- Tremor, nervousness, or anxiety
- Sweating and heat intolerance
- Weight loss or diarrhea
Important warnings
- Excess dosing can cause serious heart problems and bone loss.
- Not for weight loss or obesity treatment.
- Use cautiously with heart disease, older age, or adrenal insufficiency.
- Dose changes require monitoring; effects may take weeks.
Pregnancy
Usually continued or adjusted during pregnancy; thyroid levels need close monitoring.
Breastfeeding
Generally compatible; prescribed doses are not expected to harm a breastfed infant.
Interactions
- Warfarin: may increase bleeding risk as thyroid levels change.
- Diabetes medicines: requirements may change.
- Iron, calcium, and antacids can reduce absorption; separate by four hours.
- Some seizure medicines and rifampin can alter thyroid hormone levels.
AI-generated from general medical knowledge, not from this product's official leaflet. It may be incomplete or out of date. Not medical advice — ask a pharmacist or doctor before making any decision.