Eruptive Dysplastic Nevi Following Melanotan Use Actas Dermo Sifiliogrficas What is the 'Barbie drug' and should authorities be worried? ABC News Here's the part nobody explains when they're selling you the "Barbie drug." Melanotan 2 is a synthetic peptide that mimics alpha MSH a hormone your body already makes to tell your skin Melanotan II is the product that's been dubbed the "Barbie drug" on social media, and promises to give users a tan without the sun but it can have serious side effects including, in rare cases,