Side-by-Side Comparison

Factor	Wegovy	Mounjaro
Active Ingredient	Semaglutide	Tirzepatide
Manufacturer	Novo Nordisk	Eli Lilly
FDA Approval Year	2021	2022
FDA Indication	Obesity / chronic weight management	T2D primary
Formulation	Weekly subcutaneous injection	Weekly subcutaneous injection
Dosing Frequency	Weekly	Weekly
Starting Dose	0.25 mg	2.5 mg
Maximum Dose	2.4 mg	15 mg
Weight Loss (key trial)	14.9% mean body weight reduction (STEP-1, 68 weeks)	~15–21% body weight in SURPASS trials (T2D); up to 22.5% in SURMOUNT-1 (obesity label/Zepbound)
Key Trial	STEP-1	SURPASS-2
Cash Price (est. Q1 2026)	$1,300–$1,400/month	$1,000–$1,100/month
CVD Outcome Benefit	Yes	No / Not established

Cost estimates based on Q1 2026 data. Weight loss from named pivotal trials. Individual results vary. Verify current pricing with your pharmacy.

Which Is Right for You?

The "better" medication depends entirely on your individual medical history, insurance coverage, treatment goals, and tolerability. Here are key decision scenarios:

★ Primary goal is maximum weight loss

Based on clinical trial data, Wegovy has demonstrated higher percentage weight loss in pivotal trials. Discuss whether the magnitude of difference is clinically meaningful for your situation with your prescriber.

★ You have type 2 diabetes as primary concern

Mounjaro is FDA-approved for T2D management. Your prescriber will consider HbA1c targets, cardiovascular risk, renal function, and cost when choosing between them.

★ You have established cardiovascular disease

Wegovy has demonstrated cardiovascular outcome benefits in clinical trials. Mounjaro has not yet established this benefit. For patients with high CV risk, Wegovy may be preferred when clinically appropriate.

★ Cost is a primary factor

Cash prices differ significantly between medications. Wegovy costs approximately $1,300–$1,400/month/month without insurance; Mounjaro costs approximately $1,000–$1,100/month/month. Both manufacturers offer savings programs for commercially insured patients. Use our Cost Estimator → to compare your specific situation.

Side Effect Comparison

Wegovy Common Side Effects

•Nausea
•Vomiting
•Diarrhea
•Constipation
•Fatigue
•Injection Site Reaction
•Headache

Mounjaro Common Side Effects

•Nausea
•Diarrhea
•Vomiting
•Constipation
•Abdominal Pain
•Injection Site Reaction
•Fatigue

Both medications share GI-related side effects as the most common adverse events. The profile is very similar because both belong to the GLP-1 receptor agonist class (or include GLP-1 agonism). Differences in tolerability are individual and cannot be predicted in advance.

Cost Comparison

Scenario	Wegovy	Mounjaro
Cash pay / no insurance	$1,300–$1,400/month/mo	$1,000–$1,100/month/mo
Commercial insurance	$25/month with Novo Nordisk savings card for eligible commercially insured patients	$25/month with Eli Lilly savings card for eligible commercially insured patients
Mfr. savings program	Novo Nordisk Wegovy Savings Program	Eli Lilly Mounjaro Savings Card

Estimated based on Q1 2026 data. Always verify with your pharmacy or plan.

💰 Estimate your personalized monthly cost →

Switching Guidance

If switching between Wegovy and Mounjaro, consult your prescriber about the transition protocol. Key considerations include:

Whether to allow a washout period or transition directly
Starting dose for the new medication (may not match your current dose)
Insurance prior authorization requirements for the new medication
Monitoring frequency during transition

See our drug conversion calculator → for dose equivalency guidance.

Wegovy vs Mounjaro: Which Is Better for Weight Loss in 2026?