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Wegovy vs. Rybelsus

Published on 
February 3, 2025
Virta Team

Wegovy and Rybelsus are both semaglutide-based drugs, but their administration methods and approvals differ significantly. Wegovy is an injectable GLP-1 receptor agonist for chronic weight management, while Rybelsus is an oral formulation for type 2 diabetes. Wegovy delivers more pronounced weight loss (15% bodyweight) compared to Rybelsus’s HbA1c reductions and moderate weight effects. Wegovy has no off-label uses, whereas Rybelsus is occasionally used off-label for weight management. Common side effects of both drugs include nausea, but Rybelsus may pose higher risks of gastrointestinal discomfort. Wegovy is far more expensive, averaging $1,375/month, compared to Rybelsus’s $875/month. Neither drug currently faces shortages.

How Wegovy Works

Slows gastric emptying, reduces appetite, and enhances feelings of fullness, leading to lower calorie intake. It also stimulates insulin release and reduces glucagon secretion, improving blood sugar control.

Common Side Effects

Nausea, vomiting, diarrhea, constipation, abdominal pain, headache, and fatigue.

Serious Potential Side Effects

Pancreatitis, gallbladder issues, kidney problems, and increased heart rate, thyroid cancer, anaphylaxis (or serious allergic reactions)

How Rybelsus Works

Slows gastric emptying, reduces appetite, and enhances feelings of fullness, leading to lower calorie intake. It also stimulates insulin release and reduces glucagon secretion, improving blood sugar control.

Common Side Effects

Nausea, diarrhea, vomiting, and abdominal pain.

Serious Potential Side Effects

Pancreatitis, thyroid tumors (potential risk), gallbladder issues, kidney problems, and serious allergic reactions

Brand Name

Wegovy
Rybelsus

Generic Name

Semaglutide
Semaglutide

Overview

Used for chronic weight management in adults with obesity or overweight with related conditions and for cardiovascular event risk reduction in patients with type 2 diabetes and established cardiovascular disease. It helps regulate appetite and reduce calorie intake by mimicking a hormone that influences hunger and satiety.
GLP-1 receptor agonist available in tablet form, used to manage type 2 diabetes and also shown to aid in weight loss by reducing appetite.

Year Approved

2021 for weight loss 2024 for cardiovascular risk reduction
2019

Category

GLP-1
GLP-1

Indicated for

Chronic weight management and reducing risk of major cardiovascular events
Type 2 diabetes management

Administration type

Injectable
Oral

Also used (but not approved) for

Weight Management

Frequency

Once / week
Once / day

Typical dose range

0.25–2.4 mg
3–14 mg

Average cost per month

$1,375
$875

Availability

No current shortages
No current shortages