In the 2020s, weight loss drugs like Ozempic®, Zepbound®, and Saxenda® have transformed obesity treatment. One of the oldest treatments, Saxenda®, has become harder to find in the United States, but generic versions are now entering the market.

If you’re comparing liraglutide medications like Saxenda® versus Zepbound®, this guide will help you understand what sets them apart and how those differences may affect your experience.

What you need to know

• Zepbound® produced greater average weight loss than Saxenda® in separate clinical trials.
• The generic form of Saxenda® is becoming more common in the U.S., but many people still compare it with newer GLP-1 medications like Zepbound®.
• Both medications reduce appetite, but Zepbound® is a once-weekly dual GIP/GLP-1 injection, while Saxenda® is a once-daily GLP-1 shot.

The key differences between Zepbound® and Saxenda® for weight loss

Both Saxenda® and Zepbound® are injectable medications that help reduce appetite, slow digestion, and increase feelings of fullness. But they don't work in exactly the same way. Saxenda® targets one hormone involved in appetite regulation, while Zepbound® targets two. That difference may contribute to the greater average weight loss seen with Zepbound® in clinical trials.

*These results come from separate clinical trials (SCALE and SURMOUNT-1) with different study designs and participants. Saxenda® and Zepbound® haven’t been compared directly in a head-to-head clinical trial.

How Saxenda® and Zepbound® work

Although Saxenda® and Zepbound® both help people manage their weight by reducing appetite, they don't take exactly the same approach. The main difference comes down to the hormones they mimic.

How Saxenda® works

Saxenda® contains liraglutide, which mimics a hormone called glucagon-like peptide-1 (GLP-1). Your body naturally releases GLP-1 after you eat. It helps regulate appetite by slowing how quickly food leaves your stomach, increasing feelings of fullness and signaling to your brain that you've had enough to eat.

Because liraglutide doesn't stay in the body for very long, Saxenda® requires a once-daily injection.

How Zepbound® works

Zepbound® contains tirzepatide, which mimics both GLP-1 and another hormone called glucose-dependent insulinotropic polypeptide (GIP). Like GLP-1, GIP is released after you eat and plays a role in regulating blood sugar. Researchers also believe it may influence appetite and the way your body stores and uses energy, although scientists are still working to fully understand its role in weight loss.

By activating both the GLP-1 and GIP receptors, tirzepatide targets multiple pathways involved in appetite and metabolism. That dual action may contribute to the greater average weight loss seen in clinical trials compared with medications that target GLP-1 alone. And because tirzepatide stays in the body longer than liraglutide, you only have to inject Zepbound® once a week.

Is Saxenda® or Zepbound® better for weight loss?

The same clinical trials we referred to above, SCALE and SURMOUNT-1, suggest that Zepbound®’s weight loss results are better on average than Saxenda®. In SURMOUNT-1, adults taking the highest dose of tirzepatide lost an average of 20.9% of their starting weight after 72 weeks. In the SCALE trial, adults taking liraglutide lost an average of 8% after 56 weeks.

With either medication, you may notice changes in hunger before you see a difference on the scale. Visible weight loss often takes several weeks, and progress can vary as your dose increases. Your health conditions, activity level, and ability to stay on treatment can all affect your results.

For that reason, you should think of trial averages as benchmarks, not promises. Your provider can help you weigh the potential benefits against factors like dosing, side effects, and how well each medication fits your routine.

Saxenda® vs. Zepbound®: Side effects and safety

Both Saxenda® and Zepbound® come with potential side effects and risks. A healthcare provider can help monitor your progress, adjust your dose if needed, and manage side effects along the way.

Because the medications work similarly, they also have many of the same side effects. The most common include:

• Nausea and vomiting
• Diarrhea
• Constipation
• Stomach pain
• Indigestion

These side effects are usually most noticeable when you're starting treatment or increasing your dose. For many people, they improve as the body adjusts over time.

Although rare, both medications also carry a risk of more serious side effects, including pancreatitis, gallbladder problems, and low blood sugar when used with certain diabetes medications. Both also include a boxed warning about the potential risk of thyroid C-cell tumors and aren't recommended for people with a personal or family history of medullary thyroid carcinoma or multiple endocrine neoplasia syndrome type 2 (MEN 2).

One important thing to keep in mind: You shouldn’t take Saxenda® and Zepbound® together. Because they affect similar pathways in the body, combining them may increase the risk of side effects. If you're thinking about switching from one medication to the other, your healthcare provider can help you do so safely.

Who should take Saxenda® or Zepbound®?

While Saxenda® and Zepbound® were both developed to help with the treatment of obesity, they play different roles. Zepbound® has become a more common option for eligible adults because of its once-weekly dosing and greater average weight loss in clinical trials. Saxenda®, meanwhile, is now less common in the U.S. than generic liraglutide, though it may still be available in some areas.

When Saxenda® may make more sense

If Saxenda® is available where you live, your healthcare provider may recommend it if:

• You're 12 to 17 years old, weigh over 132 pounds (60 kg), and have obesity.
• You prefer a medication that's easier to stop before surgery or another planned procedure. Because liraglutide leaves the body more quickly than tirzepatide, it has a shorter washout period.
• Your provider believes a daily medication is a better fit for your treatment plan.

When Zepbound® may be a better fit

For many adults, Zepbound® offers a few practical advantages. Your healthcare provider may recommend it if:

• You're hoping to lose more weight based on what's been seen in clinical trials.
• You'd rather take a once-weekly injection than a daily one.
• You have moderate to severe obstructive sleep apnea and meet the criteria for treatment. In addition to weight management, the FDA has approved Zepbound® to treat obstructive sleep apnea in adults with obesity.

Comparing costs and coverage

Cost and insurance coverage can vary widely depending on your health plan, location, and eligibility. While brand-name Saxenda® has faced supply constraints and discontinued its savings card program, the arrival of generic liraglutide may offer new coverage and pricing pathways for patients.

If you're eligible for treatment, insurance may cover Zepbound®, although many plans require prior authorization and some exclude weight loss medications altogether. If you're paying out of pocket, Eli Lilly’s savings program may help reduce the cost if you qualify.

Your healthcare provider can help you compare today's treatment options based on effectiveness, insurance coverage, and long-term access—not just price.

Maven Clinic makes finding the right choice easier

Comparing medications is an important first step, but it won't tell you which option is right for you. Your medical history, insurance coverage, lifestyle, and personal preferences all play a role in the decision.

With GLP-1 Care from Maven Clinic, you'll work with specialists who can help you evaluate your options and build a personalized treatment plan that supports long-term success. Get started today to find the right weight loss treatment for you.

FAQ

Is Saxenda® being discontinued?

Novo Nordisk hasn’t discontinued Saxenda® in the United States, but brand supply has experienced shortages as production shifts toward newer GLP-1 RAs like Wegovy®. If you're exploring current weight loss medications, your healthcare provider can help you determine whether Saxenda®, generic liraglutide (Saxenda®’s active ingredient), or another option is appropriate for you.

What’s the best liraglutide alternative?

Zepbound®, Wegovy®, and other newer GLP-1 medications may be appropriate alternatives to liraglutide. The best choice depends on your health history, treatment goals, and what's available where you live.

Tirzepatide vs. Saxenda®: Which works better?

People searching for liraglutide versus Zepbound® are usually comparing the active ingredient in Saxenda® with tirzepatide, the active ingredient in Zepbound®. While separate clinical trials suggest tirzepatide leads to greater average weight loss, the medications haven't been studied head to head.

What’s the closest medication to Zepbound®?

If you're looking for a tirzepatide alternative, your provider may recommend another GLP-1 medication like Wegovy® or Saxenda®, depending on your needs. You may also hear about retatrutide, a triple agonist that’s still being studied and isn't currently available as a treatment option.

What works better than Saxenda®?

Clinical trials suggest that newer liraglutide alternatives, including Zepbound® and Wegovy®, generally lead to greater average weight loss than Saxenda®. But individual results vary, and the medications haven't all been compared directly.