You may not be able to use  Westhroid if you have a thyroid disorder called thyrotoxicosis, or an adrenal gland problem that is not controlled by treatment.
Call your doctor if you have signs 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 desiccated thyroid. However, you may not be able to use this medication if you have a thyroid disorder called thyrotoxicosis, or an adrenal gland problem that is not controlled by treatment.
To make sure desiccated thyroid is safe for you, tell your doctor if you have:
heart disease, angina (chest pain);
coronary artery disease;
congestive heart failure;
any type of diabetes; or
problems with your adrenal gland.
Desiccated thyroid is not expected to be harmful to an unborn baby, but your dose needs may be different during pregnancy. Tell your doctor if you become pregnant while taking this medicine.
Small amounts of desiccated thyroid can pass into breast milk, but this is not expected to harm a nursing baby. However, do not use this medication without telling your doctor if you are breast-feeding a baby.
