What is Ozempic (semaglutide)?

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Last updated: February 11, 2025View editorial policy

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From the Guidelines

Ozempic (semaglutide) is a glucagon-like peptide-1 (GLP-1) receptor agonist used for the management of obesity and type 2 diabetes.

Key Characteristics of Semaglutide

  • It is administered via subcutaneous injection once weekly
  • It works by mimicking the effects of GLP-1, suppressing appetite, delaying gastric emptying, increasing glucose-dependent insulin release, and decreasing glucagon secretion
  • The FDA approved semaglutide for the treatment of obesity in 2021, and it is dosed at higher levels than for type 2 diabetes management

Efficacy and Safety

  • Clinical trials, such as the STEP trials, have shown that semaglutide leads to significant weight loss, with a mean weight loss of 14.9% to 16.0% at 68 weeks, compared to 2.4% to 5.7% with placebo 1
  • Semaglutide has also been shown to reduce the risk of cardiovascular events, including cardiovascular death, nonfatal myocardial infarction, or nonfatal stroke, in patients with overweight or obesity without diabetes 1
  • The SELECT trial demonstrated a lower composite incidence of death due to cardiovascular events, nonfatal myocardial infarction, or nonfatal stroke in patients with pre-existing cardiovascular disease who were overweight or obese, but without diabetes, treated with weekly subcutaneous semaglutide 1

Comparison to Other GLP-1 Receptor Agonists

  • Semaglutide has been compared to liraglutide, another GLP-1 receptor agonist, and has been shown to have a greater magnitude of weight loss and improved weight-related comorbidities, with lower rates of gastrointestinal adverse events 1
  • The choice between semaglutide and liraglutide may depend on individual patient factors, such as cost, availability, and preference for daily versus weekly administration 1

From the FDA Drug Label

OZEMPIC (semaglutide) injection, for subcutaneous use, contains semaglutide, a human GLP-1 receptor agonist (or GLP-1 analog).

Ozempic (semaglutide) is a human GLP-1 receptor agonist or GLP-1 analog. It is administered via subcutaneous injection and is used to treat type 2 diabetes. The main mechanism of action is to stimulate insulin secretion and lower glucagon secretion in a glucose-dependent manner 2.

From the Research

What is Ozempic (Semaglutide)?

  • Ozempic, also known as semaglutide, is a glucagon-like peptide-1 receptor agonist used to treat type 2 diabetes 3, 4, 5.
  • It is manufactured by Novo Nordisk and is available in subcutaneous and oral formulations 4.
  • Semaglutide is also used for weight loss, with studies showing a loss of almost 12% of body weight over a 68-week period 6.
  • It is sold under the brand names Ozempic, Rybelsus, and Wegovy, with Ozempic being used for the treatment of type 2 diabetes and Wegovy being used for the treatment of obesity 3, 6.

Mechanism of Action

  • Semaglutide works by activating glucagon-like peptide-1 receptors, which helps to improve glycemic control and promote weight loss 4, 5.
  • It has been shown to have a beneficial effect on cardiovascular outcomes and has a low risk of severe adverse events 4, 7.

Safety and Efficacy

  • Studies have shown that semaglutide is effective in reducing HbA1c levels and promoting weight loss in patients with type 2 diabetes 4, 7, 5.
  • Common adverse events associated with semaglutide include gastrointestinal disorders, such as nausea and diarrhea 4, 7, 6.
  • Serious adverse events, such as pancreatitis and diabetic retinopathy, have also been reported, but are rare 4, 6.

Indications and Usage

  • Semaglutide is indicated for the treatment of type 2 diabetes and obesity, and is available in various formulations, including prefilled pens for subcutaneous injection and oral tablets 3, 5, 6.
  • It is recommended to be used in conjunction with diet and exercise, and has been shown to be effective in patients with a body mass index (BMI) of 30 kg/m² or higher 5, 6.

References

Guideline

Guideline Directed Topic Overview

Dr.Oracle Medical Advisory Board & Editors, 2025

Research

The Ethics of Ozempic and Wegovy.

Journal of medical ethics, 2025

Research

Safety of Semaglutide.

Frontiers in endocrinology, 2021

Research

Semaglutide: a new drug for the treatment of obesity.

Drug and therapeutics bulletin, 2023

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

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