Liothyronine should not be used to treat obesity or weight problems.
You may not be able to use  liothyronine if you have an adrenal gland problem that is not controlled by treatment.
Stop taking liothyronine and call your doctor if you have symptoms of thyroid toxicity, such as chest pain, fast or pounding heartbeats, feeling hot or nervous, or sweating more than usual.
Before taking this medicine
Since thyroid hormone occurs naturally in the body, almost anyone can take liothyronine. However, you may not be able to use this medicine if you have an adrenal gland problem that is not controlled by treatment.
Tell your doctor if you have ever had:
problems with your pituitary or adrenal gland;
heart disease, angina (chest pain);
a bleeding or blood clotting disorder;
diabetes; or
osteoporosis or low bone mineral density.
Tell your doctor if you are pregnant or breastfeeding.
Follow your doctor's instructions about using this medicine if you are pregnant. Controlling your thyroid hormone levels is very important during pregnancy, and your dose needs may be different during each trimester.
