Finding the right weight loss medication is about more than its effect on the scale. If you’re juggling a busy schedule while navigating the health changes that often come with midlife, choosing a treatment that fits your routine matters just as much as the results. 

In this Qsymia® versus Wegovy® comparison, learn more about the benefits, risks, and long-term considerations of each option.

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What you need to know

• Qsymia® combines phentermine and topiramate, while Wegovy® contains semaglutide. That means they have different drugs that help with weight loss in different ways.
• Wegovy® led to greater average weight loss than Qsymia® in separate clinical trials, although the medications haven't been compared head to head.
• Your medical history, insurance coverage, and treatment preferences all play a role in choosing between the two.

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The differences between Wegovy® and Qsymia®

Wegovy® and Qsymia® are both FDA-approved for chronic weight management, but they work differently. Wegovy® contains semaglutide, a GLP-1 receptor agonist that helps regulate appetite and food intake. Qsymia® combines two medications: phentermine, which suppresses appetite, and topiramate, which may reduce appetite and food cravings. 

These differences affect how you take each medication, the side effects you may experience, and which option may be the better fit for you.

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Who may benefit from Wegovy® or Qsymia®?

Both Qsymia® and Wegovy® can support long-term weight loss when combined with healthy eating and regular physical activity. But while some people begin noticing weight loss within the first few months of treatment, the amount of weight lost—and how quickly it happens—varies from person to person.

In the STEP 1 trial, adults taking Wegovy® (semaglutide 2.4 mg injection) lost an average of 14.9% of their body weight over 68 weeks, compared with 2.4% in the placebo group. In the CONQUER trial, adults taking the highest approved dose of Qsymia® lost an average of 10.9% of their body weight over 56 weeks, compared with 1.6% in the placebo group. 

These medications haven’t been compared in a head-to-head clinical trial, so it’s impossible to say one is more effective than the other without more evidence.

When Qsymia® may be a better fit

Qsymia® may be an option for adults and adolescents ages 12 and older who have obesity, or for adults who are overweight and have high blood pressure, type 2 diabetes, or another weight-related condition. If you prefer taking a daily pill, it may fit more easily into your routine. Your healthcare provider can help you decide whether Qsymia® is a good fit based on your medical history, current medications, and weight loss goals.

When Wegovy® may be a better fit

Wegovy® may be an option for adults with obesity, some adults who are overweight and have at least one weight-related condition, and adolescents ages 12 years and older with obesity. It's also approved to reduce the risk of heart attack and cardiovascular death in certain adults with established heart disease. Wegovy® is available as a once-weekly injection or a once-daily oral tablet, giving you more flexibility to choose the formulation that best fits your lifestyle. Adolescents are eligible for the injection only.

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Side effects and safety considerations

When comparing Qsymia® versus Wegovy® for weight loss, side effects and safety are just as important as effectiveness. Knowing what to expect can help you make a more informed decision with your healthcare provider.

Qsymia® side effects and risks

Common Qsymia® side effects include:

• Dry mouth
• Constipation
• Tingling in the hands or feet
• Brain fog
• Difficulty recalling words
• Dizziness
• Upper respiratory tract infections

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Because Qsymia® contains phentermine—a Schedule IV controlled substance—some people also experience insomnia, anxiety, or an increased heart rate. Phentermine also follows different prescribing rules than non-controlled medications like Wegovy®.

It’s also important to note that Qsymia® isn't safe to use during pregnancy because topiramate has been linked to an increased risk of birth defects. Your healthcare provider will typically recommend a pregnancy test before starting treatment and effective contraception while taking the medication if pregnancy is possible.

Qsymia® may also affect mood or thinking in some people, so tell your healthcare provider if you notice changes in your memory, concentration, or mental health.

Wegovy® side effects and risks

The most common Wegovy® side effects are gastrointestinal (GI) issues like nausea, diarrhea, and constipation. These side effects are usually more noticeable when you begin treatment or increase your dose. They often improve as your body adjusts.

Some people also notice hair shedding while taking GLP-1 medications. In many cases, this is thought to be related to rapid weight loss or changes in nutrition rather than the medication itself. If you're concerned, talk with your healthcare provider about possible causes and ways to support healthy hair growth.

Wegovy® also carries important warnings, including a boxed warning about the potential risk of thyroid C-cell tumors based on animal studies. Your healthcare provider can help determine whether it's appropriate based on your medical and family history.

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Cost and insurance coverage

Cost is another important factor when choosing a weight loss medication. The amount you pay for Qsymia® or Wegovy® depends on your insurance coverage, whether you qualify for savings programs, and the pharmacy you use. 

Out of pocket, Qsymia® costs $210 for a 90-day supply when purchased through the Qsymia® Engage program. Wegovy® runs between $150–$399 a month, depending on the administration method and dose. 

On July 1, 2026, Medicare launched the Medicare GLP-1 Bridge program to help eligible patients access certain GLP-1 drugs, including Wegovy®. Note that not all GLP-1 formulations are covered. If you qualify, that could reduce the cost of treatment. Generally, Medicare doesn’t cover Qsymia®. 

No matter which medication you choose, check with your insurance provider to understand your benefits before starting treatment. Your healthcare provider can also help you explore lower-cost alternatives if needed. 

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How to choose the right weight loss medication

If you’re comparing Qsymia® versus the Wegovy® pill or injection, your medical history, treatment preferences, and long-term health goals all play a role in finding the right option.

Maven Clinic's GLP-1 Care program connects you with specialists who can help you compare FDA-approved weight loss medications, understand your insurance options, and build a personalized treatment plan. Beyond prescribing medication when appropriate, Maven provides ongoing support with nutrition and long-term weight management strategies to reduce the risk of weight gain over time.

Get started today to find the right weight loss treatment for your body.

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FAQ

Is Qsymia® or Wegovy® more effective for weight loss?

Both medications can support significant weight loss when combined with healthy lifestyle changes, but studies suggest Wegovy® leads to greater average weight loss than Qsymia®. Because the medications haven't been compared in a head-to-head clinical trial, it's not possible to say one is definitively more effective than the other for every person. Your healthcare provider can help determine which option best fits your health needs.

What’s the difference between Qsymia® and semaglutide medications like Wegovy®?

When comparing Qsymia® versus semaglutide medications, the biggest difference is how the medications work. Qsymia® combines phentermine and topiramate to help reduce appetite and cravings, while semaglutide is a GLP-1 receptor agonist that helps regulate appetite and food intake. Wegovy® is the one brand name for semaglutide that's FDA-approved for chronic weight management.

Can you switch from Qsymia® to Wegovy®?

Yes. You may want to switch to a medication like Wegovy® depending on your progress, side effects, and overall health. Changes in insurance coverage and monthly cost may also drive this shift. No matter why you’re interested in the adjustment, talk to your healthcare provider. They can help you determine whether changing medications or your treatment plan is the best next step.

What are some alternatives to Qsymia®?

Qsymia® alternatives include other FDA-approved weight loss medications like Zepbound®, Wegovy®, or Contrave®. The best option depends on your medical history, health goals, and treatment preferences.

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