Five years ago, weight loss medication options were limited and the results were modest. That's changed. Today there are multiple FDA-approved medications producing results that rival bariatric surgery — no operating room required. But with all these options on the market, figuring out which one makes sense for you can feel like a lot.
This guide covers every major weight loss medication available in 2026, organized by how they work, how well they work, and what they cost.
GLP-1 Receptor Agonists (Injectables)
These are the medications that changed everything about obesity treatment. GLP-1 receptor agonists mimic a natural hormone that controls appetite, blood sugar, and digestion. They're delivered as weekly self-injections using a pre-filled pen — similar to an insulin pen, and usually painless.
Semaglutide (Wegovy, Ozempic)
Wegovy is the FDA-approved weight management version of semaglutide. At the standard 2.4 mg weekly dose, clinical trials showed about 15-17% body weight loss over 68 weeks. The newer Wegovy HD (7.2 mg) bumps that to 21% — the highest ever recorded for a semaglutide dose.
Ozempic uses the same molecule at a lower max dose (2.0 mg) and is FDA-approved for type 2 diabetes. Doctors commonly prescribe it off-label for weight loss. Results are slightly less than Wegovy because of the lower dose, but still meaningful.
- Average weight loss: 15-21% (depends on dose)
- Retail cost: ~$1,300/month (Wegovy), ~$900/month (Ozempic)
- Clinic cost: ~$250-$400/month
- Common side effects: Nausea, constipation, diarrhea — usually temporary. See our side effects guide
Tirzepatide (Zepbound, Mounjaro)
Zepbound is FDA-approved for weight management. It's a dual-action medication hitting both GLP-1 and GIP receptors, which may explain why it edges out semaglutide on effectiveness. In trials, patients on the highest dose lost an average of 20-22% of their body weight.
Mounjaro is the diabetes-approved version, often prescribed off-label for weight loss. Our Zepbound vs Mounjaro comparison covers the differences that actually matter.
- Average weight loss: 20-22%
- Retail cost: ~$1,000-$1,200/month
- Clinic cost: ~$300-$500/month
- Common side effects: Similar GI profile to semaglutide
Liraglutide (Saxenda)
Saxenda is an older GLP-1 medication that requires daily injections instead of weekly. It produces more modest weight loss — roughly 5-8%. Fewer doctors prescribe it now, but it's still an option for patients who can't tolerate semaglutide or tirzepatide. Our detailed comparison has more on that.
Oral Medications
Oral Semaglutide (Rybelsus)
Rybelsus is a daily pill form of semaglutide, currently approved for type 2 diabetes. An oral version designed specifically for weight loss is in late-stage trials, but some providers already prescribe Rybelsus off-label. Our pill versus injection comparison breaks down the tradeoffs.
Contrave (Naltrexone-Bupropion)
Contrave combines two existing drugs — naltrexone (used in addiction treatment) and bupropion (an antidepressant). It targets the brain's reward center to dial back cravings. Weight loss is more modest (5-8%), but it can be a solid fit for patients whose eating is tied to emotional or reward-driven patterns.
- Average weight loss: 5-8%
- Cost: ~$100-$300/month (generic available)
- Notable: May help with food addiction behaviors
Phentermine
One of the oldest prescription weight loss drugs on the market. Phentermine is an appetite suppressant usually prescribed for short-term use (12 weeks). It's cheap and widely available, but carries more side effect risk — elevated heart rate, insomnia, anxiety — and isn't meant for long-term treatment.
- Average weight loss: 3-5% (short-term)
- Cost: ~$15-$30/month (generic)
- Notable: Short-term use only; DEA Schedule IV controlled substance
Compounded Medications
Compounded versions of semaglutide and tirzepatide have been available through specialty pharmacies at lower prices than the brand-name versions. But the regulatory picture is shifting, and availability may tighten. These aren't FDA-approved products, and quality varies between pharmacies.
How to Choose the Right Medication
The best medication for you depends on your health profile, goals, budget, and how well you tolerate side effects. A few key questions:
- How much weight do you need to lose? If it's 50+ pounds, GLP-1 injectables are the most effective tools available.
- Do you have type 2 diabetes? Semaglutide and tirzepatide manage blood sugar and weight at the same time.
- What can you afford? Monthly costs range from $15 (phentermine) to $1,400 (brand-name Wegovy at retail). A weight loss clinic can cut GLP-1 costs dramatically — our savings calculator shows the numbers.
- Does your insurance cover it? Coverage is all over the place. Our insurance coverage guide explains the specifics.
- Can you handle weekly injections? If needles are a dealbreaker, oral options exist — though they're less effective right now.
What Is Coming Next
The pipeline of weight loss medications keeps growing. Several next-generation treatments in late-stage trials go after additional hormonal pathways, with some early data showing 25-30% average weight loss. Oral versions of GLP-1 medications approved specifically for weight loss are also expected within the next 1-2 years.
Finding the Right Provider
Which medication you take matters — but so does who prescribes it. A qualified weight loss specialist will look at your full health picture, recommend the right drug, track your progress, and adjust your plan as needed. A generic prescription without proper follow-up produces worse results. The Obesity Action Coalition offers free guides on choosing and working with weight loss providers.
Search our directory of 2,800+ weight loss clinics to find providers near you. Filter by medication offered, visit type, and location. Browse clinics in Dallas, San Diego, Atlanta, and Portland, or explore telehealth programs if you'd rather go virtual.