IMPORTANT WARNING:  

Why is this medication prescribed?  

Liothyronine, a thyroid hormone, is used to treat hypothyroidism, a condition where the thyroid gland does not produce enough thyroid hormone. Without this hormone, the body cannot function properly, resulting in poor growth, slow speech, lack of energy, weight gain, hair loss, dry thick skin, and increased sensitivity to cold. When taken correctly, liothyronine reverses these symptoms. Liothyronine is also used to treat goiter (enlarged thyroid gland) and to test for hyperthyroidism (a condition where the thyroid gland produces too much thyroid hormone).

How should this medicine be used?     

Liothyronine comes as a tablet to take by mouth. It usually is taken as a single dose before breakfast every day. To control the symptoms of hypothyroidism you probably will need to take this medicine for the rest of your life. It may take about 2 weeks before you notice any change in your symptoms. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take liothyronine exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor.

Continue to take liothyronine even if you feel well. Do not stop taking liothyronine without talking to your doctor.

Other uses for this medicine     

This medication may be prescribed for other conditions; ask your doctor or pharmacist for more information.

What storage conditions are needed for this medicine?     

Keep this medication in the container it came in, tightly closed, and out of reach of children. Store it at room temperature and away from excess heat and moisture (not in the bathroom). Throw away any medication that is outdated or no longer needed. Talk to your pharmacist about the proper disposal of your medication.

In case of emergency/overdose     

In case of overdose, call your local poison control center at 1-800-222-1222. If the victim has collapsed or is not breathing, call local emergency services at 911.

What other information should I know?     

Keep all appointments with your doctor and the laboratory. Your doctor will order certain lab tests to check your response to liothyronine.

Do not let anyone else take your medication. Ask your pharmacist any questions you have about refilling your prescription.

Brand names     

Other names