What condition has the FDA issued a black box warning against using thyroid hormones for treatment?

The FDA has issued a black box warning against the use of thyroid hormones for the treatment of obesity due to the serious potential risks associated with misuse. Thyroid hormones can significantly increase metabolism, which makes them appealing for weight loss; however, they can lead to serious cardiovascular complications, including arrhythmias, hypertension, and other heart-related problems.

Using thyroid hormones in individuals who do not have hypothyroidism can lead to excessive stimulation of the thyroid gland and can exacerbate underlying health issues, particularly in those with pre-existing heart disease. This is why the warning specifically highlights the dangers of using these medications for weight management purposes rather than legitimate medical conditions such as hypothyroidism. The focus on weight loss emphasizes the divergence between the intended therapeutic use of thyroid hormone and the potential for abuse, leading to severe health complications.