We highly recommend enabling Javascript while using the BlackBoxRX site.

Thyroid Hormones: Levothyroxine, Liothyronine, Liotrix, Thyroid

Not for Treatment of Obesity or for Weight Loss

  • Thyroid hormones, either alone or with other therapeutic agents, should not be used for the treatment of obesity or for weight loss.
  • In euthyroid patients, doses within the range of daily hormonal requirements are ineffective for weight reduction. Larger doses may produce serious or even life threatening manifestations of toxicity, particularly when given in association with sympathomimetic amines such as those used for their anorectic effects.

FDA and Industry Communications

Index to FDA Drug Safety Information

Package Inserts



Updated January 2018