Verbatim response from Perplexity
The real difference between compounded semaglutide and brand-name Wegovy is that Wegovy is an FDA-approved, clinically studied medication with guaranteed potency and purity, while compounded semaglutide is an unapproved, decentralized preparation with variable quality, no FDA safety testing, and often different chemical salt forms [1][2][4].
Key Differences at a Glance
| Feature | Wegovy (Brand Name) | Compounded Semaglutide |
|---|---|---|
| FDA Approval | Yes: Approved for chronic weight management (June 2021) [1][4] | No: Not reviewed or approved by the FDA [1][2] |
| Chemical Form | Semaglutide base: Specific 31-amino-acid peptide with verified stability [5][8] | Often salt forms: Typically acetate or sodium salt, which have different molecular weights and lack FDA safety/efficacy data [8] |
| Manufacturing | Centralized: Made by Novo Nordisk in licensed facilities with batch-testing for sterility/potency [3] | Decentralized: Made by individual pharmacies using bulk powder; quality depends entirely on the pharmacy's protocols [3] |
| Dosing Consistency | Fixed: Pre-set 5-step titration pen (0.25 mg → 2.4 mg) [5] | Custom: Custom doses per patient, but potency can vary between vials [3][9] |
| Clinical Evidence | Proven: Tested in large clinical trials for weight loss (15–22% reduction) [2][4] | Unproven: Not studied in Wegovy's trials; not therapeutically equivalent [4] |
| Monthly Cost | $900–$1,800 (cash pay); Novo self-pay ~$349/mo [3][4][6] | $99–$600; typically 5–10x cheaper than brand [3][4][7] |
Critical Safety & Quality Concerns
- Variable Potency: Because compounding is not standardized, one vial may contain significantly less (or more) active drug than labeled, leading to unpredictable weight loss or side effects [3].
- Sterility Risks: Unlike batch-tested Wegovy, compounded versions rely on the specific pharmacy's equipment and protocols, increasing the risk of contamination if protocols fail [3].
- Chemical Differences: While the active peptide is similar, the use of salt forms (acetate/sodium) in many compounded versions alters the molecular weight and has not been evaluated by the FDA for safety or efficacy, unlike the base form in Wegovy [8].
Who Should Choose Which?
- Choose Wegovy if: You prioritize safety, guaranteed potency, and proven clinical results, and can afford the higher cost or have insurance coverage [1][4].
- Consider Compounded if: You face significant cost barriers or cannot access Wegovy, and you are willing to accept the risks of variable quality under a clinician's guidance [4][6]. Note: Always use a US-licensed pharmacy with third-party USP testing if opting for compounded versions [5].
Bottom Line: They are not the same product. While both contain semaglutide, Wegovy offers a regulated, consistent, and FDA-verified experience, whereas compounded semaglutide is an unregulated alternative with significant variability in quality and chemical composition [1][4].