Peptide laws in Mexico
Last updated: October 3, 2026 · 5 min read · By the Grey Peptides Editorial Board
- Mexico's medicines regulator is COFEPRIS. Approved peptides such as semaglutide, liraglutide and tirzepatide are prescription medicines.
- COFEPRIS has warned against using GLP-1 drugs without medical supervision and against buying medicines online, and has flagged falsified semaglutide pens.
- Research peptides such as BPC-157 have no sanitary registration. A bill introduced in July 2026 would ban their sale to the public; it is not law as of October 3, 2026.
- Each status on this page is dated and sourced.
How Mexico regulates peptides
Mexico regulates medicines under the Ley General de Salud (General Health Law), enforced by the Comisión Federal para la Protección contra Riesgos Sanitarios, COFEPRIS. A medicine needs a sanitary registration (registro sanitario) to be marketed. A July 2026 bill summarises the current law's two relevant categories: Article 221 defines a medicine as a natural or synthetic substance with therapeutic, preventive or rehabilitative effect presented in pharmaceutical form, and Article 215 defines food supplements, which cannot take injectable forms 1. The bill's authors argue that research peptides without registration fit neither category, leaving a gap 1.
Peptide medicines that do hold registration, the bill notes, such as semaglutide, liraglutide and tirzepatide, are legal with a medical prescription 1.
COFEPRIS on GLP-1 drugs
On June 4, 2024, COFEPRIS issued communiqué 77/2024 to doctors and the public on the risks of indiscriminate use of semaglutide and liraglutide. It said it had detected their promotion on social media and entertainment platforms for rapid weight loss, which can cause serious harm or even death, recommended not buying medicines or other health supplies through online sales platforms, social media or informal businesses, and asked people to report adverse reactions 2.
COFEPRIS has also issued health alerts on the falsification and irregular sale of semaglutide products including Ozempic, Wegovy and Saxenda pens, listing specific lot numbers, based on information from the manufacturer's Mexican subsidiary 3. The alert advised buying only from establishments with a sanitary licence and proof of legal acquisition of the product 3.
Research peptides: a legal gap, and a bill to close it
Research peptides such as BPC-157, TB-500, CJC-1295, ipamorelin, GHK-Cu, melanotan II and epitalon have no sanitary registration in Mexico. In July 2026, Deputy Ivonne Aracelly Ortega Pacheco, coordinator of the Movimiento Ciudadano group in the Chamber of Deputies, introduced a bill to add an Article 215 Bis to the General Health Law 1. Its exposition describes these compounds circulating through social media, messaging groups, gyms and longevity clinics, largely bought from suppliers in China without health supervision 1.
The proposed article would define 'research peptides without sanitary registration' as amino-acid chains with neither a medicine registration nor supplement classification that are promoted or sold for aesthetic, sporting, recovery or general wellbeing purposes. It would expressly prohibit their sale, distribution, marketing and supply to the public, including through digital platforms and social media; allow them only in authorised research protocols; require COFEPRIS to issue and keep updated a list of such compounds by official standard, reviewed at least every two years; and let them obtain registration as medicines if clinical evidence of safety, quality and efficacy is shown 1. Transitional provisions would give COFEPRIS 180 days to issue the standard and sellers 90 days after that to stop or seek registration 1.
As of October 3, 2026, this is a bill, not law. We found no record of its approval. Until any change, research peptides remain unregistered products outside the medicine and supplement categories.
Buying online and importing
COFEPRIS's standing advice is not to buy medicines through online platforms, social media or informal sellers 2, and its falsified-semaglutide alert shows why 3. We did not find a COFEPRIS statement specific to importing research peptides for personal use, and we do not describe import rules we have not read from a primary source. Anyone travelling to Mexico with prescribed peptide medicines should carry them in original packaging with the prescription.
Sport
Mexican athletes follow the WADA Prohibited List. BPC-157 is prohibited under S0, and growth hormone secretagogues and releasing peptides are named under S2.2.4 4. Our WADA hub lists each peptide's status.
Mexico in context
Mexico's bill echoes actions elsewhere in 2026: Health Canada's statement that injectable peptides are prescription drugs, Brazil's ANVISA clarification that peptides such as BPC-157 are irregular in every category, and the inspectorate orders in the Netherlands. Our Brazil page and Canada page cover those. In the United States, the FDA's handling of BPC-157 and other peptides is covered on our PCAC hub.
Questions to check
- Does the product have a COFEPRIS sanitary registration, and is it prescribed?
- Is the seller a licensed establishment, or a social-media or online seller?
- Does the lot number match a COFEPRIS falsification alert?
- Has the 2026 Article 215 Bis bill passed? As of October 3, 2026, it had not.
- Am I subject to anti-doping rules?
The bottom line
In Mexico, approved peptide medicines are prescription products regulated by COFEPRIS, which has warned against unsupervised GLP-1 use and online purchase and flagged falsified semaglutide pens. Research peptides have no registration and sit in a legal gap; a July 2026 bill would ban their sale to the public and have COFEPRIS list them, but it is not yet law.
Frequently asked questions
Are peptides legal in Mexico?
Peptide medicines with a COFEPRIS sanitary registration are legal with a prescription. Research peptides have no registration; a July 2026 bill would ban their sale to the public but is not law.
Is BPC-157 legal in Mexico?
It has no sanitary registration. A 2026 bill would prohibit its sale to the public; as of October 3, 2026 it had not passed. It is prohibited in sport under WADA's S0.
Does COFEPRIS allow buying semaglutide online?
COFEPRIS advises against buying medicines through online platforms, social media or informal sellers and has issued alerts on falsified semaglutide pens.
What is Article 215 Bis?
A proposed addition to Mexico's General Health Law, introduced in July 2026, that would define and ban the public sale of research peptides without sanitary registration.
Related on Grey Peptides
Sources
- Cámara de Diputados, LXVI Legislatura. Iniciativa con proyecto de decreto por el que se adiciona un artículo 215 Bis a la Ley General de Salud, en materia de regulación de péptidos de investigación de uso estético y deportivo, a cargo de la Dip. Ivonne Aracelly Ortega Pacheco (Movimiento Ciudadano). July 2026 (SIL record dated July 29, 2026); read October 3, 2026. Source
- COFEPRIS. Comunicado 77/2024: Cofepris advierte sobre riesgos de automedicación con fármacos para bajar de peso. June 4, 2024; read October 3, 2026. Source
- COFEPRIS. Alerta sanitaria: falsificación y comercialización irregular de productos con principio activo semaglutida (Ozempic, Wegovy y Saxenda), as relayed by the San Luis Potosí state health-risk agency (COEPRIS SLP). Read October 3, 2026.
- Grey Peptides WADA hub (2026 Prohibited List). Read October 3, 2026.
Educational information, not medical advice. Each dose in this guide names its source, an approved label or a published study. None is a recommendation for you. An unapproved compound has no established safe or effective human dose, and products sold for “research use only” are not made or tested for people. Talk to a doctor before acting on anything on this site, including before you start, stop or change any medicine or dose.
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