Melanotan II Spreads on Social Media, Triggering 22-Hour Priapism Risk
Updated
Updated · Office for Science and Society · Jul 2
Melanotan II Spreads on Social Media, Triggering 22-Hour Priapism Risk
2 articles · Updated · Office for Science and Society · Jul 2
Summary
Melanotan II is being sold through TikTok-linked and other online channels as an unregulated tanning peptide, often in generic packaging that obscures what buyers are actually getting.
A 41-year-old man developed priapism lasting 22 hours after one injection; doctors drained about 700 millilitres of blood, and his erectile function had not recovered a month later.
A 2025 interview study of 29 users found the market was not driven mainly by young women but by users averaging age 39, with more than three in four men tied to gym and bodybuilding circles.
Less than 1 in 5 social-media posts about melanotan mention that it is unregulated, while affiliate links, free products and influencer trust help sellers bypass platform hashtag bans and formal medical warnings.
More than a third of posts that mention skin cancer falsely frame melanotan as protective or a sunscreen substitute, reviving a claim the FDA pursued for 9 years against one U.S. seller.
If the 'Barbie drug' can cause cancer and organ failure, why do online influencers still promote it?
Melanotan II was created to prevent skin cancer, so how did it become a black market cancer risk?
The FDA just eased restrictions on the 'Barbie drug,' so why did Australia recently classify it with heroin?
Australia’s 2026 Crackdown on Melanotan II: Health Risks, Social Media Promotion, and Legal Consequences of Unregulated Peptides
Overview
In June 2026, the Australian Therapeutic Goods Administration (TGA) launched a major crackdown on unregulated peptide products like Melanotan II, driven by growing concerns about their safety and legality. The TGA warned the public about the risks of buying these substances online, especially from overseas websites and social media, where they are easily accessible without proper oversight. This enforcement action highlights the TGA’s commitment to protecting public health, as more consumers are exposed to unapproved products promoted through digital channels. The agency signaled its intent to use strong enforcement measures to address these dangers.