Zepbound vs. Wegovy: key differences & similarities

If you’ve been trying to lose weight, you’ve probably heard of Zepbound (tirzepatide) and Wegovy (semaglutide). So, how do they stack up? The short answer: Zepbound generally produces more weight loss than Wegovy, but there are subtle differences in how they work, dosing, and who they are suitable for. 

Read on to learn everything you need to know about Zepbound vs. Wegovy. 

In addition to weight loss and management, Zepbound is also approved for obstructive sleep apnea and typically results in higher weight loss (up to 22.5%). Wegovy is also approved for cardiovascular risk reduction and for the treatment of fatty liver disease.

7 key differences between Zepbound and Wegovy

1. Zepbound and Wegovy have different active ingredients. Zepbound’s active ingredient is tirzepatide (the same as Mounjaro), while Wegovy’s is semaglutide (the same as Ozempic).

2. Zepbound is a dual GLP-1/GIP receptor agonist, while Wegovy is a GLP-1 receptor agonist. Meaning, Zepbound targets two hormone receptors (GLP-1 and GIP) vs. Wegovy’s one (GLP-1).  

3. Only Wegovy is available in oral and injectable forms. Both the Wegovy and Zepbound injections must be administered once a week, on the same day each week. The Wegovy pill must be taken daily, first thing in the morning.

4. Zepbound produces more weight loss than Wegovy. In clinical trials, people taking Zepbound lost 16%–22.5% of their body weight in 72 weeks. By comparison, people taking injectable Wegovy lost 14.9% in 68 weeks, and people taking oral Wegovy lost 13.6% in 64 weeks. In a head-to-head randomized clinical trial of Zepbound vs Wegovy, people taking Zepbound lost 6.5% more weight than those taking Wegovy (20.2% vs 13.7%) over 72 weeks.

5. While both are approved for weight loss, they have additional indications that differ. Zepbound is also approved to treat moderate to severe obstructive sleep apnea in adults with obesity. Wegovy is also approved to treat fatty liver disease and to reduce cardiovascular risk in adults with heart disease and obesity or overweight.

6. Only Wegovy is approved for people under 18 for weight loss. The Wegovy injection is approved for people aged 12 and up. The Wegovy pill and Zepbound are only approved for use in adults.

7. Out-of-pocket, Wegovy generally costs less than Zepbound. Cash payers can get the Wegovy pill for $149–$299* per month, the Wegovy injection for $349 per month, and Zepbound vials for $299-$449 per month, all depending on dose (and, of course, if prescribed). 

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Choosing between Wegovy and Zepbound 

Consider choosing Wegovy if…

• You also want to manage your heart disease or fatty liver disease

• You prefer to choose between a pill or injection

• You pay cash for your prescriptions

• You are under 18 and have obesity

• Your insurance covers Wegovy (either for weight loss or another approved indication)

Consider choosing Zepbound if…

• Your main goal is weight loss

• You also want to manage your obstructive sleep apnea

• You prefer a weekly injection

• You are 18 or older

• Your insurance covers Zepbound (either for weight loss or another approved indication)

That being said, everyone is different. So, there’s no one-size-fits-all approach to deciding between Wegovy and Zepboud. Plus, your healthcare provider is best equipped to decide which treatment is a fit given your medical history, health goals, and other individual factors. 

When it comes to list price, here’s how the two drugs compare:

• Wegovy: $1,349.02 per month

• Zepbound: $1,086.37 per month 

But if you pay cash for your prescriptions, Wegovy typically costs less. On Ro, for example, you can get the two medications at the following cash prices:

• Wegovy pen: $349 per month

• Wegovy pill: $149–$299* per month, depending on dose

• Zepbound vials: $299–$499 per month, depending on dose

Exactly how much you pay for Zepbound vs. Wegovy, however, depends on factors such as insurance coverage (if any), discounts or savings programs, preferred pharmacy, and location.

*Certain prices are available as part of a limited-time offer. Starting April 15, 2026, the 4 mg dosage of the Wegovy pill will increase to $199 per month.

Zepbound cost

If your insurance plan covers Zepbound, you may pay as little as $25 for a one-month (four pens) or three-month (12 pens) supply through the manufacturer’s savings program. However, those with government-sponsored insurance, like Medicare or Medicaid, are not eligible for this program. 

For those whose insurance does not cover Zepbound, the savings program offers a reduced monthly price of $499. 

The next best option is to get Zepbound on Ro, where it can be purchased (if prescribed) in single-dose vials at the following prices:

• $299 per month: 2.5 mg dose 

• $399 per month: 5 mg dose 

• $499 per month: 7.5 mg, 10 mg, 12.5 mg, and 15 mg doses (with manufacturer offer)

Finally, you can pay at or around full list price for Zepbound ($1,086.37 per month) when you fill the Rx at your local pharmacy. You can still lower the cost of Zepbound with pharmacy-specific coupons available through platforms like GoodRx and others. 

Wegovy cost 

If your insurance plan covers Wegovy, drug manufacturer Novo Nordisk offers a savings program that offers eligible people the opportunity to pay as little as $25 per month. The savings card program is not available to people with government-sponsored insurance plans, such as Medicare or Medicaid.

No insurance? Or would you rather pay with cash? On Ro, Wegovy is available (if prescribed) for as little as $149 per month. 

Here’s how much the Wegovy pill costs on Ro when you self-pay:

• $149 per month: 1.5 mg dose

• $149 per month (through April 15, 2026), then $199 per month: 4 mg dose 

• $299 per month: 9 mg and 25 mg doses 

The Wegovy injection costs $349 per month on Ro when you opt for self-pay.

And just like with Zepbound, you can also get Wegovy at or around its list price ($1,349.02 per month) when you pay out of pocket at your local pharmacy.  Websites such as GoodRx offer coupons that can reduce costs at major pharmacies (think: Walgreens, CVS, and Walmart). 

Zepbound is a once-weekly injection with doses ranging from 2.5 mg to 15 mg, whereas Wegovy comes as a once-weekly injection in 0.25 mg–2.4 mg strengths or a daily pill in 1.5 mg–25 mg strengths. Both involve a gradual dose-escalation process.

This means you start with a low dose and slowly increase it over time. This process (aka titration) helps the body adjust to the medication and can help minimize common side effects, such as digestive discomfort or nausea. 

The goal is to find a maintenance dose that works effectively with minimal side effects. There are recommended maintenance doses for both drugs: 

• Zepbound maintenance doses: 5 mg, 10 mg, or 15 mg

• Wegovy maintenance doses: 1.7 mg or 2.4 mg (injection), 25 mg (pill) 

However, your maintenance dose may differ, depending on your response to the medication and your healthcare provider’s discretion.

When purchased on Ro, the lower doses of the drugs cost less than the higher doses. 

Zepbound doses and dosage schedules

Zepbound is available as pre-filled pens and vials. Both options include a single dose of the medication. But with the vials, you’ll use a syringe to draw the liquid medication out of the vial before injecting it.

Zepbound doses include 2.5 mg, 5 mg, 7.5 mg, 10 mg, 12.5 mg, and 15 mg (maximum dose). Administering the medication requires a subcutaneous (under-the-skin) injection in your upper arm, abdomen, or thigh once weekly. 

Here’s a possible Zepbound dosing schedule: 

**Some people continue this as a long-term maintenance dosage.

Wegovy doses and dosage schedules 

Wegovy (semaglutide) comes in two different forms: oral tablets or pre-filled, single-use injectable pens. Each pen is pre-measured with the exact dose. The Wegovy tablets and pen come in different dosage strengths:

• Wegovy injection: 0.25 mg, 0.5 mg, 1 mg, 1.7 mg, and 2.4 mg

• Wegovy pill: 1.5 mg, 4 mg, 9 mg, 25 mg

Like Zepbound, the injections must be administered subcutaneously in the upper arm, abdomen, or thigh once weekly. The Wegovy pill must be taken daily, first thing in the morning on an empty stomach, at least 30 minutes before food, beverages, or other medications. 

Here’s a possible Wegovy dosing schedule:

**Some people continue this as a long-term maintenance dosage.

The most common side effects of Zepbound and Wegovy are gastrointestinal, such as nausea, vomiting, and diarrhea. 

For most people, these side effects tend to be most intense when starting treatment and increasing dosage. They typically subside over time as your body gets used to the medication.

Both medications can also cause rare but serious side effects. These may include:

• Severe hypoglycemia (low blood sugar), especially in people with type 2 diabetes

• Acute pancreatitis 

• Gallbladder issues 

• Kidney problems

• Severe gastrointestinal reactions

• Diabetic retinopathy complications in people with type 2 diabetes 

• Pulmonary aspiration during general anesthesia or deep sedation

Some side effects may make Zepbound or Wegovy a safer or more preferred option for you. For example:

• If you’re concerned about experiencing injection site reactions on Zepbound or Wegovy injection, the Wegovy pill may be a better option. 

• If you want to avoid stomach flu-like symptoms on Wegovy, your healthcare provider may recommend Zepbound instead.

People with a personal or family history of medullary thyroid carcinoma (MTC) or multiple endocrine neoplasia syndrome type 2 should not take Wegovy or Zepbound due to the potential increased risk of developing thyroid cancer found in animal studies. 

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When comparing Zepbound vs. Wegovy for weight loss, research shows that Zepbound generally comes out on top.  

In clinical studies, people taking Zepbound lost up to 22.5% of their body weight over 72 weeks, while those taking injectable Wegovy lost up to 15% over 68 weeks. (For the Wegovy pill, the weight loss is a bit less, at 13.6% in 64 weeks.) 

A head-to-head randomized clinical trial, SURMOUNT-5, tested Zepbound vs Wegovy in people with obesity. After 72 weeks, people taking the highest tolerated dose of Zepbound had lost an average of 20.2% of their starting weight. Those taking the highest tolerated dose of Wegovy had lost an average of 13.7% of their starting weight. This means that Zepbound resulted in a 6.5% greater weight loss than Wegovy, on average.

Further analysis of weight management data from large trials such as SURMOUNT-1 (for Zepbound) and STEP 1 (for Wegovy) also highlights Zepbound’s superior weight loss results. The higher doses of Zepbound (10 mg and 15 mg) led to greater weight loss and a higher likelihood of achieving at least 5% weight loss compared to Wegovy. 

Another indirect comparison study showed that Zepbound was more effective in reducing weight, with a higher percentage of participants achieving at least 5% weight loss.

The TL;DR? Ultimately, Zepbound may offer more significant weight loss benefits than Wegovy. This is likely due to its dual-action mechanism targeting two hormone pathways (GIP and GLP-1) vs Wegovy’s sole focus on GLP-1. However, Zepbound may also cause more side effects in some people, which could impact your ability to tolerate the medication. 

Currently, Zepbound and Wegovy are exclusively available as brand-name medications in the United States. Meaning, their generic versions are not yet available.  

Once their respective patents expire in the US, the generic names for Zepbound and Wegovy would be the names of their active ingredients: tirzepatide for Zepbound and semaglutide for Wegovy.  

That said, a generic version of Wegovy may become available in countries such as India, China, and Canada sometime in 2026, according to The New York Times.  

If you still have questions about Zepbound and Wegovy, it’s important to ask your healthcare provider which medication may be right for you. Here are a few common questions you may want to bring up during your next visit: 

• Do I qualify for Zepbound or Wegovy based on my health condition? 

• How much weight can I lose with Wegovy? How much can I lose with Zepbound? 

• How quickly will you move my dose of Wegovy or Zepbound up? 

• Can I stay on a low dose of Wegovy or Zepbound, or do I have to titrate up? 

• Can I switch from Wegovy to Zepbound?

Both Zepbound and Wegovy are powerful weight loss medications that can help treat obesity or overweight. But while they are similar, there are a few distinct differences between the two.  

• Both Zepbound (tirzepatide) and Wegovy (semaglutide) are effective weight-loss medications for adults with obesity or overweight and at least one weight-related health condition.

• Zepbound may promote greater weight loss than Wegovy, with separate clinical trials showing up to 22.5% body weight reduction for Zepbound users vs. 15% for Wegovy users. Zepbound led to 6.5% more weight loss than Wegovy in a head-to-head clinical trial.

• Wegovy comes in injectable and oral forms, while Zepbound is only available as an injection. The Wegovy pill must be taken daily, while the injectable version is administered weekly.

• Both Zepbound and Wegovy share similar side effects, such as nausea, vomiting, and diarrhea. But titrating up slowly can help eliminate unwanted side effects. 

• Cost varies significantly based on insurance and savings programs, with Wegovy’s cash pricing offering a more affordable option for those without coverage.

• The decision between Zepbound and Wegovy should be guided by your healthcare provider, considering your health goals, side effect tolerance, and budget.