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Endomorphin-1: is it legal in your state?

Endomorphin-1 is legal to sell at retail in 51 states, restricted in 0, in a gray area in 0 and illegal in 0. Federal: not federally scheduled. Verified through October 22, 2026.

Select a state on the map or in the list for the controlling law, verbatim.

Endogenous opioid tetrapeptide (Tyr-Pro-Trp-Phe-NH2) with high mu-opioid affinity. Unscheduled in all 51 US jurisdictions - an opioid peptide with no structural similarity to any scheduled small-molecule opioid, so no state analogue act reaches it on the RUO path. Binding constraint is FEDERAL and use-dependent: unapproved new drug under FD&C 21 USC 355 for any consumer/human-use marketing, and the Analogue Act human-consumption hinge (SC/NE closest calls). RUO ONLY.

Framework: CSA scheduling · Reference article

Legal 51 · Restricted 0 · Gray 0 · Illegal 0 · Not verified 0
LegalRestrictedGray areaIllegalNot yet verified

Federal posture

Not federally scheduled. Endomorphin-1 - not federally scheduled; endogenous opioid tetrapeptide, no CSA entry and no analogue-act structural hook Federal detail and instruments

Status by state

Related compounds (CSA scheduling)

Cite this page

Compound Analytics. "Endomorphin-1 Legality by State (2026): Map, Verbatim Law, Deadlines." Compound Laws, https://compoundlaws.com/compounds/endomorphin-1/. Accessed October 25, 2026.

Compound Laws, published by Compound Analytics, reports the record: statutes verbatim, official citations, enforcement facts and verification dates. Nothing here is legal advice and nothing here describes how to get around a law. A jurisdiction with no verified row is reported as not yet verified, never as legal. Found an error? Corrections policy.

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