Legal status · United Kingdom
Is Vasopressin legal in the United Kingdom?
Yes. Vasopressin is an approved medicine in the United Kingdom, classified as "Licensed, prescription only (MHRA)". 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. Human evidence: Strong.
Vasopressin in the United Kingdom at a glance
| Classification | Licensed, prescription only (MHRA) |
|---|---|
| MHRA approval status | Approved by MHRA for its labeled use |
| Evidence level | Strong (research strength: Strong) |
| Reviewed | Sep 2026 |
Classification and note come from the Vasopressin profile, checked against Medicines and Healthcare products Regulatory Agency (MHRA) listings at the reviewed date.
What this means
- 01
MHRA has approved Vasopressin for at least one labeled indication, so a pharmaceutical-grade product exists in the United Kingdom 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 Vasopressin is
The natural water-retention hormone, FDA-approved as a drug to raise blood pressure in critically ill patients.
Vasopressin, or antidiuretic hormone, regulates water balance by concentrating urine through kidney V2 receptors and constricts blood vessels through V1 receptors. 3% on norepinephrine, not a significant difference, and in VANISH, 409 patients given early vasopressin saw no improvement in kidney-failure-free days.
Mechanism: Activates V2 receptors in the kidney to retain water and V1 receptors on blood vessels to raise blood pressure.
Regulatory history: FDA-approved (Vasostrict) for vasodilatory shock
How MHRA treats this kind of product
Licenses medicines for the UK market. A compound without a marketing authorisation is an unlicensed medicine, which can only lawfully be supplied for human use through a prescriber under the specials scheme, not sold as a research product.
The classification above is the The Longevity Archive reading of Medicines and Healthcare products Regulatory Agency listings for Vasopressin 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.
Vasopressin in other countries
Frequently asked questions
Is Vasopressin legal in the United Kingdom?
Yes. Vasopressin is an approved medicine in the United Kingdom, classified as "Licensed, prescription only (MHRA)". 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. Human evidence: Strong.
Can I buy Vasopressin in the United Kingdom?
Only with a prescription. Vasopressin is classified as "Licensed, prescription only (MHRA)" in the United Kingdom, 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.
Is Vasopressin MHRA approved?
Yes, for its labeled indication. In the United Kingdom Vasopressin is classified as "Licensed, prescription only (MHRA)". For comparison, the US FDA status is: FDA-approved (Vasostrict) for vasodilatory shock. Evidence level: Strong.
Related compounds in the United Kingdom
Full research profile
Mechanism, cited studies, FDA status and the full legal summary for Vasopressin live on its compound profile.
Vasopressin profileThis page is general information about the regulatory status of Vasopressin in the United Kingdom, current as of Sep 2026. It is not legal advice, and classifications change; check Medicines and Healthcare products Regulatory Agency 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.