Viral 'Barbie drug' for tanning can cause brain swelling and even cancer, experts warn Martina Big, 36, who is from Germany, and her husband Michael Eurwen, 38, who both injected Melanotan, a synthetic hormone to darken their skin have announced that they are planning to permanently MT 2 Melanotan II 10 mg Melanotan II an overview ScienceDirect Topics Melanocortin agonism in a social context selectively activates nucleus accumbens in an oxytocin dependent manner ScienceDirect Clinically important side effects of Melanotan II and placebo Download Table