GLP-1 Drugs for Weight Loss: Where to Buy

GLP-1 medication can help people with overweight or obesity who have at least one weight-related health condition manage their weight.

Some medications, such as Ozempic (semaglutide), only have Food and Drug Administration (FDA) approval for the management of type 2 diabetes. However, healthcare professionals may prescribe them off-label for weight loss.

Best for approved weight loss medications

Best for approved type 2 diabetes management medications

These medications mimic gut peptides, which help regulate blood sugar. Research from 2021 has found that, in conjunction with appropriate lifestyle habits, they can help people lose a significant amount of weight or maintain weight loss.

Incretin hormones cause the body to produce insulin when eating sugar, which is called the incretin effect. People with type 2 diabetes either have a decreased or absent incretin effect. GLP-1 medication can help manage blood sugar by encouraging insulin production.

One effect of GLP-1 medication is delayed gastric emptying, which can make people feel fuller for longer. This effect has led to companies creating GLP-1 medication specifically for weight management, including the FDA-approved drugs Wegovy and Zepbound.

At the time of publishing, the FDA has only approved three GLP-1 agonists for weight loss: Wegovy (semaglutide), Zepbound (tirzepatide), and Saxenda (liraglutide). These medications are only available to people with a body mass index (BMI) of 27 or over with at least one weight-related health condition or people with a BMI of 30 or over.

Wegovy

Wegovy is available as a once-weekly injection in several doses, ranging from 0.25 to 2.4 milligrams (mg). The FDA approved this drug for use in weight management in June 2021.

Research from 2023 has found that people taking Wegovy lost more weight than those taking a placebo, with a mean difference in total weight loss of 12.6% after 68 weeks.

Zepbound

Zepbound received FDA approval for use in weight management in November 2023. This medication is available in doses of 2.5 to 15 mg in a once-weekly injection. Healthcare professionals will start people with the lowest possible dose and can increase it, if necessary, by 2.5 mg each time.

Research from 2023 shows that tirzepatide, the main ingredient in Zepbound, can reduce body weight, with higher doses being more effective. This medication appears to be more effective for weight loss than liraglutide, but more studies are necessary to see how it compares to semaglutide.

Saxenda

Saxenda received FDA approval for weight management in adults in 2014 and approval for use in children ages 12 years and over in 2021. People will inject Saxenda once daily, starting at 0.6 mg per dose. Healthcare professionals will increase the dose by 0.6 mg each week until people reach the full dose of 3 mg.

While Saxenda is effective for weight loss, people may notice slower or less obvious results. Research from 2023 found that people lost 8% of their body weight after 56 weeks, but this decreased to 6.1% after 160 weeks.

Two popular GLP-1 medications, Ozempic and Mounjaro (tirzepatide), only have FDA approval for the management of type 2 diabetes. However, some healthcare professionals may prescribe these off-label for weight loss.

Many healthcare professionals will require people to meet the same prescribing criteria as GLP-1 medications for weight loss.

Ozempic

Ozempic is available in doses of 2 mg to 8 mg in once-weekly injections. Research has found that Ozempic positively affects metabolic control and helps reduce cardiovascular risks in people with type 2 diabetes.

A 2-year study also found that semaglutide, Ozempic’s active ingredient, led to sustained weight loss compared to a placebo.

Mounjaro

Mounjaro is available in 2.5 to 15 mg once-weekly injections. Its active ingredient is tirzepatide, a GIP receptor agonist that activates both the GLP-1 and GIP receptors to improve blood sugar regulation. This dual effect may make tirzepatide more effective than other injectable diabetes medications.

According to 2023 research, Mounjaro is very effective for weight loss, with people losing up to 15% of their body weight while taking this medication. However, people are more likely to experience gastrointestinal side effects with Mounjaro.

Here, we compare the most popular GLP-1 medications on price*, dose frequency, and FDA approval.

*Note: All prices are current at the time of publishing, and come from Optum Perks, a free coupon search engine. The price for each medication is the lowest cost of a 28-day or monthly supply of the lowest possible dose from popular pharmacies.

Regulating blood sugar and helping with weight management are not the only benefits of GLP-1 medications. A 2020 review found that GLP-1 drugs may help reduce the risk of:

• diabetic cardiomyopathy
• myocardial infarction
• stroke
• high blood pressure
• dyslipidemia

Some of the most common side effects of these medications are:

• decreased appetite
• indigestion
• abdominal pain
• nausea
• vomiting
• constipation
• diarrhea

Possible serious risks and side effects include:

• serious allergic reactions
• low blood sugar
• diabetic retinopathy complications
• severe stomach, gallbladder, or kidney problems
• inflammation of the pancreas, or pancreatitis

Rodent studies have also shown that semaglutide, tirzepatide, and liraglutide can cause thyroid C-cell tumors. Health experts do not yet know whether these injectable diabetes drugs can cause tumors in humans, but it is important to understand the risk. All of these medications have FDA boxed warnings.

Manufacturers generally warn against using these drugs if a person has a personal or family history of medullary thyroid carcinoma, a type of thyroid cancer, or multiple endocrine neoplasia syndrome type 2 (MEN 2), an endocrine system condition.

Learn more about the side effects of semaglutide (Ozempic).

Healthcare professionals only recommend injectable diabetes drugs for weight loss for people who either have obesity or overweight and another weight-related medical condition.

Weight-related medical conditions include:

Some doctors may prescribe injectable diabetes drugs for weight loss if a person has overweight or obesity and has indications of prediabetes.

Manufacturers did not design these drugs for people with moderate weight who want to lose additional weight. Despite their popularity on social media, these medications carry significant risks and can be harmful to those who do not need them.

The FDA has approved several GLP-1s for type 2 diabetes management and for weight loss. Healthcare professionals may prescribe type 2 diabetes medication for weight loss off-label if people meet certain criteria.

People will need to have obesity, or have overweight and at least one weight-related health condition to use GLP-1 medications. Some drugs, such as those containing semaglutide and tirzepatide, are more effective than others.