Your Side Effects May IncludeOzempic side effects
semaglutide
This side effect is printed on the FDA label for Ozempic. It was a question in our daily quiz, where you pick the real side effect from four choices.
Possible thyroid tumors, including cancer
It caused thyroid tumors in rats and mice. Nobody knows yet if it does in people, so it carries a boxed warning.
“In rodents, semaglutide causes dose-dependent and treatment-duration-dependent thyroid C-cell tumors at clinically relevant exposures. It is unknown whether OZEMPIC causes thyroid C-cell tumors, including medullary thyroid carcinoma (MTC), in humans”
Tell your doctor about a lump or swelling in your neck, hoarseness, trouble swallowing, or shortness of breath.
171 reports to the FDA's adverse event system mention thyroid cancer or a thyroid tumor. A report is not proof the drug caused it. See the query
From quiz No. 1 · September 25, 2026 · Play that quiz →
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Not medical advice. Don't stop or start a medication because of a quiz. Talk to your doctor or pharmacist. Label text and report counts from openFDA. Not affiliated with any drug maker.