IMB issues warning over tanning injections at salons or bought on internet The Irish Times Experts lash use of popular social media sun tanning drug Melanotan 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 Experts sound alarm over 'Barbie' drug that can cause serious health issues Irish Star 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,