Skip to Content
Living with hypothyroidism? Explore treatment options >>

Liothyronine Pregnancy and Breastfeeding Warnings

Liothyronine is also known as: Cytomel, Triostat

Liothyronine Pregnancy Warnings

Liothyronine has been assigned to pregnancy category A by the FDA. Thyroid hormones do not readily cross the placental barrier. Clinical experience to date has not indicated any adverse effect of thyroid hormone therapy on human fetuses. On the contrary, hypothyroidism may lead to poor pregnancy outcome. Thyroid replacement therapy should be maintained during pregnancy.

Liothyronine Breastfeeding Warnings

Liothyronine is excreted into human milk in small amounts. Liothyronine, in replacement doses, is not expected to cause adverse effects in the nursing infant. The manufacturer recommends that caution be used when administering liothyronine to nursing women. However, adequate replacement doses of thyroid hormone are needed to maintain normal lactation.

See Also...

Disclaimer: Every effort has been made to ensure that the information provided by Cerner Multum, Wolters Kluwer Health and is accurate, up-to-date and complete, but no guarantee is made to that effect. In addition, the drug information contained herein may be time sensitive and should not be utilized as a reference resource beyond the date hereof. This material does not endorse drugs, diagnose patients, or recommend therapy. This drug information is a reference resource designed as supplement to, and not a substitute for, the expertise, skill , knowledge, and judgement of healthcare practitioners in patient care. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate that the drug or combination is safe, effective, or appropriate for any given patient. Multum Information Services, Inc. does not assume any responsibility for any aspect of healthcare administered with the aid of information Multum provides. Copyright 2000-2008 Multum Information Services, Inc. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the drugs you are taking, check with your doctor, nurse, or pharmacist.