GLP-1 Weight-Loss Injections: What Works, Who It’s For & How to Start (2026)

Quick takeaways

These meds work-when used properly. Semaglutide (Wegovy®) averaged ~15% weight loss in a pivotal trial; tirzepatide (Zepbound™) often exceeds 20% in obesity studies. 

What’s FDA-approved for weight management: Wegovy (semaglutide) and Zepbound (tirzepatide). Ozempic®/Mounjaro® are diabetes drugs; clinicians may use them off-label for weight, but they aren’t approved for that purpose. 

Safety first: Labels carry a boxed warning about thyroid C-cell tumors (observed in rodents) and list MTC/MEN2 as contraindications-so screening is essential. 

Compounded copies aren’t FDA-approved. FDA warns some products use salt forms (e.g., semaglutide sodium/acetate), which are different active ingredients than in approved drugs. 

Where to compare options: Scroll to the provider table at the top of this page to see current pricing, availability, and what’s included (RO, MEDVI, Mochi Health, Remedy Meds).

What GLP-1/GIP medicines actually do

GLP-1 medicines (and GLP-1/GIP combos like tirzepatide) mimic gut hormones that help you feel full sooner, reduce cravings, and smooth out blood-sugar swings. The result is fewer calories with less “white-knuckle” hunger-especially when you pair the medication with protein-forward meals and light strength training. (Think: easier, steadier adherence rather than sheer willpower.) Evidence from large trials supports meaningful, sustained losses. 

The main prescription options (2026)

Wegovy® (semaglutide, weekly)

FDA-approved for chronic weight management in adults (and teens 12+). In STEP-1, patients lost about 15% on average at 68 weeks alongside lifestyle support; the label now also includes reduced risk of major cardiovascular events in adults with obesity/overweight and CVD. 

Zepbound™ (tirzepatide, weekly)

FDA-approved for chronic weight management in adults with obesity/overweight. In SURMOUNT-1, average weight loss surpassed 20% at higher doses. Dual GLP-1/GIP activity may explain the potency seen in trials. 

Ozempic® (semaglutide) / Mounjaro® (tirzepatide)

Both are approved for type 2 diabetes (with cardiometabolic benefits on their labels) and are sometimes used off-label for weight loss. If weight management is the goal and you’re eligible, clinicians typically consider on-label options first. 

Dose matters. Most programs start low and increase at ~4-week intervals to improve tolerability. Follow the specific titration in your prescription and keep your clinician posted on side effects. (See each drug’s label for details.) 

Who usually qualifies

Adults with BMI ≥30, or BMI ≥27 with a weight-related condition (e.g., high blood pressure, dyslipidemia, sleep apnea, T2D). Pediatric criteria apply for Wegovy ages 12+. Final eligibility is clinical. 

Safety & side effects (please read)

Common effects include nausea, vomiting, diarrhea/constipation, and abdominal discomfort - often improving as the dose stabilizes. Serious risks can include gallbladder issues, pancreatitis, and kidney injury. Do not use if you (or a family member) have had medullary thyroid carcinoma (MTC) or MEN2. Discuss pregnancy plans and all meds with your clinician. Review the Prescribing Information before starting. 

Real-world results: what to expect

Most people do best when they keep protein intake up, lift 2–3×/week, and check in regularly for dose adjustments and side-effect management. In STEP-1 (semaglutide), ~15% average loss was achieved over 68 weeks; tirzepatide trials often report 20%+. Your mileage will vary, but consistency is the cheat code. 

Brand-name vs. compounded (important)

Brand-name, FDA-approved: Wegovy and Zepbound are approved for chronic weight management; they have standardized dosing, safety monitoring, and manufacturer labeling. 

Compounded copies: Not FDA-approved. FDA cautions that some compounded products use semaglutide salts (e.g., sodium/acetate) that are different active ingredients than the approved drugs; quality and legality vary by circumstance and state. If you consider compounding, verify pharmacy type and ingredients. 

Tip: If an FDA-approved option is accessible, it’s generally preferred. If you’re exploring compounding for cost or access, ask the provider to confirm the base form of semaglutide (not a salt) and the pharmacy’s credentials.

Cost & coverage-what to know

Program or membership fees (telehealth, follow-ups) are often separate from medication cost. Read the fine print so there are no surprises.

Manufacturer support programs exist for the FDA-approved brands; eligibility varies. Check details directly with the brand’s official resources. 

Ready to compare? Use the table above to review RO, MEDVI, Mochi Health, and Remedy Meds - prices, what’s included, shipping speed, and eligibility steps.