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How does Wegovy work for weight loss?

Medically reviewed by Leigh Ann Anderson, PharmD. Last updated on Nov 13, 2024.

Official answer

by Drugs.com

Wegovy works by targeting an area in the brain that helps to regulate appetite and how much you eat. It can also make you feel fuller for longer. It closely mimics a natural hormone in the body called incretin, which is made primarily in our digestive tract.

What is it?

Wegovy (semaglutide) is a once-weekly subcutaneous (under the skin) glucagon-like peptide-1 (GLP-1) receptor injection. It is approved by the FDA:

  • To reduce the risk of major adverse cardiovascular events (cardiovascular death, non-fatal heart attack, or non-fatal stroke) in adults with established heart disease and either obesity or overweight.
  • To reduce excess body weight and maintain weight loss in people 12 years of age and older with obesity.
  • To reduce excess body weight and maintain weight reduction over the long-term in adults who are overweight and have at least one weight-related medical condition like high blood pressure, type 2 diabetes, or high cholesterol.

Wegovy is used in addition to a reduced calorie diet and increased physical activity.

Wegovy contains the active ingredient semaglutide, a GLP-1 receptor agonist medicine. Wegovy should not be used with other semaglutide-containing products (such as Ozempic or Rybelsus) or other GLP-1 receptor agonist medicines.

It is not known if Wegovy is safe and effective for use in children under 12 years of age.

How does Wegovy affect appetite?

Wegovy (semaglutide) reduces appetite by mimicking the action of a natural hormone called glucagon-like peptide-1 (GLP-1). GLP-1 is an appetite hormone made primarily in your digestive tract that targets areas of the brain to regulate appetite, especially after eating. It causes reduced appetite and the release of insulin.

Wegovy is classified as a human glucagon-like peptide-1 (GLP-1) receptor agonist and occupies the GLP-1 receptor in the brain that regulates appetite. Wegovy slows how quickly the stomach empties, which makes you feel fuller for longer. It also enhances the production of insulin.

You will lose weight with Wegovy because you will typically eat less and feel fuller when you do eat. Wegovy treatment is recommended for long-term use if it’s effective for you, but be sure to use it in addition to a healthy diet and exercise to help promote weight loss.

  • With continued use, Wegovy has been shown in studies to help people lose weight and keep it off for over two years. Studies were conducted in adults with obesity or with overweight and at least one weight-related comorbidity.
  • On average, people lost about 15% of their weight (equal to about 35 lbs) vs. a 2.6% (6 lb) weight loss in the group that took a placebo (inactive) treatment after 2 years time.
  • About 77% of patients taking Wegovy maintained their weight loss at 2 years.

This is not all the information you need to know about Wegovy (semaglutide) for safe and effective use and does not take the place of your doctor’s directions. Review the full product information and discuss this information and any questions you have with your doctor or other health care provider.

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Read next

How does semaglutide work for weight loss?

You could lose weight with semaglutide (Wegovy) because you will eat less, and feel fuller when you do eat. Semaglutide does this by closely mimicking a natural hormone in our bodies called incretin. It targets an area in the brain (called GLP-1 receptors) that help to regulate your appetite and how much you eat. Continue reading

Why am I not losing weight on Ozempic?

Although Ozempic is not FDA-approved for weight loss, over 86% of people lose at least 5% of their body weight in trials that have studied semaglutide, the active ingredient of Ozempic. But the same clinical trials also show that just under 14% don’t lose weight, and some may even gain weight. Continue reading

How much does semaglutide cost?

Semaglutide (Wegovy) injection for weight loss treatment costs about $1430 per month if you are paying cash. Semaglutide for treatment of type 2 diabetes costs $1029 per month for either the Ozempic pen injection or 30 oral tablets of Rybelsus. Continue reading

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