Dangerous 'Barbie drug' Melanotan II sparks crackdown on social media influencers ABC News Melanotan What It Is and Its Relation to Skin Cancer It doesn't take much to fall down the Barbie Drug rabbit hole. In self tanner subreddits and on TikTok Shop, the tanning injectionaka Melanotan IIis marketed as a self tanner alternative that works by Viral 'Barbie drug' for tanning can cause brain swelling and even cancer, experts warn Structure of Melanotan I. Download Scientific Diagram