Clinically important side effects of Melanotan II and placebo Download Table Your body already makes a hormone that tells your skin to tan. Melanotan 2 is a synthetic peptide engineered to mimic that hormone but in a version that's more potent and Viral 'Barbie drug' for tanning can cause brain swelling and even cancer, experts warn Melanotan II in Santa Barbara, CA Eternity Health Partners Buy Melanotan II for Erectile Dysfunction: What the Evidence Shows and Practical Considerations Melanotan 2 Day 4: Whacky Side Effects. , I am cutting back from daily use and probably using once a week from here on out. , Zero appetite, Fatigue, And what I think was sleep paralysis , And yes