Victoza (liraglutide) does the same work as a hormone that occurs naturally in the body and helps regulate blood sugar, insulin levels, and digestion.
Victoza should be combined with diet and exercise to boost blood sugar control. It’s for treatment of patients with type 2 diabetes mellitus (adults and children 10 years or older). It is also used to reduce the chances of developing severe heart issues which include heart attack or stroke in adults with type 2 diabetes  and heart disease.  In some cases, it is used to treat diabetes if the usual drugs are not working.
The Saxenda brand of liraglutide is combined with diet and exercise to help people lose weight when they have certain health problems. It should not be used to treat type 1 or type 2 diabetes.
Doctors advise people not to use victoza if they have multiple endocrine neoplasia type 2 (tumors in your glands), a personal or family history of medullary thyroid cancer, insulin-dependent diabetes, or diabetic ketoacidosis. Studies show that liraglutide can lead to thyroid tumors or thyroid cancer.  No evidence links these effects with people using frequent doses.
Visit your doctor immediately if you experience symptoms of a thyroid tumor such as swelling or lump in your neck, swallowing difficulty, a hoarse voice or shortness of breath.