In animal studies, Victoza® caused thyroid tumors—including thyroid cancer—in
some rats and mice. It is not known whether Victoza® causes thyroid tumors or a
type of thyroid cancer called medullary thyroid cancer (MTC) in people, which may
be fatal if not detected and treated early. Do not use Victoza® if you or any of
your family members have a history of MTC or if you have Multiple Endocrine Neoplasia
syndrome type 2 (MEN 2). While taking Victoza®, tell your doctor if you get a lump
or swelling in your neck, hoarseness, trouble swallowing, or shortness of breath.
These may be symptoms of thyroid cancer.
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