• 27 Apr, 2026
• SendSlim Team
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FDA-Approved Weight Loss Medications Guide

What Are FDA-Approved Weight Loss Medications?

Losing weight is hard. For many people, diet and exercise alone are not enough. That is why doctors sometimes recommend medication to help. The U.S. Food and Drug Administration (FDA) has approved several medications to help adults manage their weight. These medicines are meant to be used alongside healthy eating and physical activity — not instead of them.

FDA approval means a medication has been tested for safety and effectiveness in clinical trials. It does not mean the drug works the same way for everyone. Results vary from person to person. A licensed clinician can help you decide if a weight loss medication is right for your health needs and goals.

Who May Be a Candidate for Weight Loss Medication?

Not everyone qualifies for prescription weight loss medication. Doctors typically consider these medicines for adults who have a body mass index (BMI) of 30 or higher. They may also be an option for adults with a BMI of 27 or higher who also have a weight-related health condition, such as high blood pressure, type 2 diabetes, or high cholesterol.

Before prescribing any medication, a clinician will review your full medical history, current medications, and overall health. Some medications are not safe for people with certain conditions, including heart disease, a history of eating disorders, or pregnancy. Always speak with a qualified medical provider before starting any weight loss drug.

GLP-1 Receptor Agonists: Semaglutide and Liraglutide

Semaglutide (brand names Wegovy and Ozempic) and liraglutide (brand name Saxenda) belong to a class of drugs called GLP-1 receptor agonists. These medicines mimic a natural hormone in your body that helps regulate appetite and blood sugar. They work by making you feel full sooner and reducing hunger signals in the brain.

Wegovy (semaglutide 2.4 mg) was approved by the FDA in 2021 specifically for chronic weight management. Clinical trials published in the New England Journal of Medicine showed that participants using semaglutide alongside lifestyle changes experienced meaningful reductions in body weight compared to those using a placebo. Saxenda (liraglutide 3 mg) received FDA approval for weight management in 2014. Both are given as weekly or daily injections.

Common side effects of GLP-1 medications include nausea, vomiting, diarrhea, and constipation. These effects are often strongest when first starting the medication and may lessen over time. These drugs are not recommended for people with a personal or family history of certain thyroid tumors.

Tirzepatide (Zepbound)

Tirzepatide, sold under the brand name Zepbound, received FDA approval for chronic weight management in November 2023. It is a dual-action medication that targets both GLP-1 and GIP receptors — two hormones involved in appetite regulation and metabolism. This makes it unique among currently approved weight loss drugs.

In clinical trials, tirzepatide showed significant reductions in body weight among participants who also followed a reduced-calorie diet and increased physical activity. Like semaglutide, it is given as a weekly injection. Side effects are similar to other GLP-1 medications and include digestive issues, especially when beginning treatment.

Older FDA-Approved Options: Orlistat, Phentermine-Topiramate, and Naltrexone-Bupropion

Orlistat (brand name Xenical, or the lower-dose over-the-counter version Alli) works differently from GLP-1 drugs. It blocks the absorption of about one-third of the fat you eat. Orlistat has been FDA-approved since 1999 and is one of the longest-studied weight loss medications available. Side effects can include oily stools and digestive discomfort, especially if high-fat meals are eaten.

Phentermine-topiramate (brand name Qsymia) combines two medications. Phentermine suppresses appetite, and topiramate is an anti-seizure drug that also appears to reduce hunger. It is taken as a daily pill. Naltrexone-bupropion (brand name Contrave) combines a drug used for addiction treatment with an antidepressant. Together, they affect areas of the brain involved in hunger and cravings. Both medications have specific safety warnings and are not appropriate for all patients.

Phentermine alone (without topiramate) is also FDA-approved as a short-term weight loss aid, typically for up to 12 weeks. It is a stimulant and is not appropriate for people with heart conditions or high blood pressure. Your clinician will help determine which option, if any, fits your health profile.

How to Get a Prescription Safely

Weight loss medications are only available with a prescription from a licensed clinician. Getting proper medical oversight is important. A clinician will check for drug interactions, monitor for side effects, and adjust your treatment as needed. Self-medicating or buying these drugs without a prescription is unsafe and illegal.

Telehealth services have made it easier to access this kind of care. SendSlim.com offers video and phone visits with licensed clinicians in California and Nevada for just $50 per visit — no insurance required. This is a convenient option for people who want professional guidance on whether weight loss medication may be appropriate for them.

Medication Is Just One Part of the Picture

FDA-approved weight loss medications are tools — not cures. All of them are studied and approved for use alongside a reduced-calorie diet and increased physical activity. Without those lifestyle changes, medications are much less effective. Long-term weight management requires building healthy habits that support your overall well-being.

It is also worth knowing that some people stop responding to a medication over time, or may need to switch drugs. Regular check-ins with your provider help ensure your plan stays on track. If you have questions about whether any FDA-approved weight loss medication is right for you, speaking with a qualified clinician through a service like SendSlim is a simple first step.

Conclusion

Several FDA-approved medications can support weight management efforts for the right candidates. From newer options like semaglutide and tirzepatide to established treatments like orlistat, each drug works differently and carries its own benefits and risks. The best choice depends on your personal health history, current conditions, and goals. Always work with a licensed medical provider to make safe, informed decisions about weight loss treatment.

References

• Wilding, John P.H. et al. “Once-Weekly Semaglutide in Adults with Overweight or Obesity.” New England Journal of Medicine. 2021.
• U.S. Food and Drug Administration. “FDA Approves New Medication for Chronic Weight Management.” FDA.gov. 2023.
• Jastreboff, Ania M. et al. “Tirzepatide Once Weekly for the Treatment of Obesity.” New England Journal of Medicine. 2022.
• National Institute of Diabetes and Digestive and Kidney Diseases. “Prescription Medications to Treat Overweight and Obesity.” National Institutes of Health. 2023.
• Apovian, Caroline M. et al. “Pharmacological Management of Obesity: An Endocrine Society Clinical Practice Guideline.” Journal of Clinical Endocrinology and Metabolism. 2015.