What it means
MEN 2 is caused by changes in the RET gene and runs in families. People with it have a very high lifetime risk of medullary thyroid carcinoma, and some also develop tumors of the adrenal or parathyroid glands.
GLP-1 medicine labels list MEN 2 as a contraindication, which means the drug should not be used. This ties back to the thyroid C-cell tumors seen in rodent studies.
If close relatives have had thyroid cancer and you do not know the type, mention it to your prescriber. They can help decide whether more information is needed before starting treatment.
Genetic testing for RET changes is available, and families with known MEN 2 often have specialist care already. Bring those records to any appointment where a GLP-1 is being discussed.
Why it matters
Knowing your family history before your appointment can save time and keep you safe.
Related terms
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