Doctors warn: How weight-loss drugs affect the thyroid gland

GLP-1 weight-loss drugs carry a warning about the risk of thyroid cancer. Doctors explain that the risk is mainly relevant for those with a family history of a rare cancer called MTC. Additionally, those taking thyroid-balancing medications may need to change their morning routine.

An article on Channel 14 warns about the effects of popular GLP-1 weight-loss drugs, such as Wegovy and Ozempic, on the thyroid gland. The warning refers to the risk of a rare cancer called MTC, which was discovered in studies on rodents. The quoted doctors clarify that the risk is mainly relevant for those with a family history of this cancer or MEN2 syndrome, and that common conditions like hypothyroidism or Hashimoto's are not a reason to avoid treatment. The article also provides guidelines for combining the drugs with levothyroxine, including a schedule for taking it on an empty stomach, and notes that significant weight loss may require dose adjustment.