Legal status · United States
Is Vosoritide legal in the United States?
Written by Aaron CuhaReviewed Sep 2026
Direct answer
Yes. Vosoritide is an approved medicine in the United States, classified as "FDA-approved, prescription only". Approval covers its labeled indication and it is supplied on prescription, not over the counter. Products labeled "research use only" fall outside that approval and the label does not make human use lawful. On the evidence, 1 human study is cited on its profile.
Vosoritide in the United States at a glance
| Classification | FDA-approved, prescription only |
|---|---|
| Note | Approved to increase linear growth in children with achondroplasia who have open epiphyses. The approved endpoint is annualised growth velocity; final adult height data was not available at approval. |
| FDA approval status | FDA-approved as Voxzogo to increase linear growth in children with achondroplasia with open epiphyses. Approval rests on growth velocity, not final adult height. |
| Human studies cited | 1 of 1 citations on the profile |
| Reviewed | Sep 2026 |
Classification and note come from the Vosoritide profile, checked against U.S. Food and Drug Administration (FDA) listings at the reviewed date.
What this means
- 01
FDA has approved Vosoritide for at least one labeled indication, so a pharmaceutical-grade product exists in the United States and is dispensed on prescription.
- 02
Approval is indication-specific. Uses outside the label are a clinical decision for a prescriber, not something the approval itself authorizes.
- 03
Unlicensed online vials, including those labeled "research use only", are not the approved product and are not covered by the approval.
What Vosoritide is
A C-type natriuretic peptide analogue approved for achondroplasia on a randomised phase 3. It increases growth velocity by roughly 1.6 cm a year, and nobody knows the effect on final adult height.
Vosoritide is the clearest example on this site of a peptide designed from a precise understanding of a single mutation. Achondroplasia is caused by a gain-of-function mutation in FGFR3 that over-suppresses growth plate cartilage.
Mechanism: A 39-amino-acid analogue of C-type natriuretic peptide, modified to resist degradation by neutral endopeptidase, which destroys the native peptide within minutes. It binds natriuretic peptide receptor B, raising cyclic GMP and activating protein kinase G, which inhibits the RAF and MEK and ERK cascade at the level of RAF-1.
Regulatory history: FDA-approved as Voxzogo to increase linear growth in children with achondroplasia with open epiphyses. Approval rests on growth velocity, not final adult height.
How FDA treats this kind of product
Approves prescription drugs by indication and polices unapproved products, including peptides sold online. Compounding pharmacies may prepare some compounds under a prescription when the FDA places them on a permitted bulk-substances category.
The classification above is the The Longevity Archive reading of U.S. Food and Drug Administration listings for Vosoritide at the reviewed date, not a legal opinion. Rules change, and importing, prescribing and possessing a compound can each be treated differently. Check the regulator directly before acting on anything here.
Vosoritide in other countries
Frequently asked questions
Is Vosoritide legal in the United States?
Yes. Vosoritide is an approved medicine in the United States, classified as "FDA-approved, prescription only". Approval covers its labeled indication and it is supplied on prescription, not over the counter. Products labeled "research use only" fall outside that approval and the label does not make human use lawful. On the evidence, 1 human study is cited on its profile. Note: Approved to increase linear growth in children with achondroplasia who have open epiphyses. The approved endpoint is annualised growth velocity; final adult height data was not available at approval.
Can I buy Vosoritide in the United States?
Only with a prescription. Vosoritide is classified as "FDA-approved, prescription only" in the United States, so it is dispensed by pharmacies against a prescription for its approved indication. Buying it from unlicensed online sellers or as a "research chemical" is outside that system and carries no regulatory protection. Note: Approved to increase linear growth in children with achondroplasia who have open epiphyses. The approved endpoint is annualised growth velocity; final adult height data was not available at approval.
Is Vosoritide FDA approved?
Yes. FDA status: FDA-approved as Voxzogo to increase linear growth in children with achondroplasia with open epiphyses. Approval rests on growth velocity, not final adult height.. Current US classification: "FDA-approved, prescription only". On the evidence, 1 human study is cited on its profile.
Related compounds in the United States
Full research profile
Mechanism, cited studies, FDA status and the full legal summary for Vosoritide live on its compound profile.
Vosoritide profileThis page is general information about the regulatory status of Vosoritide in the United States, current as of Sep 2026. It is not legal advice, and classifications change; check U.S. Food and Drug Administration directly or consult a lawyer for a specific situation. Educational use only. This database summarizes published research. It is not medical advice and contains no dosing protocols or recommendations for personal use. The Longevity Archive has no vendor relationships and does not recommend where to buy anything.