Dangerous 'Barbie drug' Melanotan II sparks crackdown on social media influencers ABC News You don't need the 'Barbie drug' to tan, whatever social media says Viral 'Barbie drug' for tanning can cause brain swelling and even cancer, experts warn 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