Melanotan is not a tan. It's an unregulated peptide with real risk. As a dermatologist, here's the reality: It has been linked to new and changing moles including cases of Melanotan II injection resulting in systemic toxicity and rhabdomyolysis PDF) Increasing illegal use of Melanotan: The Barbie drug hype Background Melanotan II injection resulting in systemic toxicity and rhabdomyolysis Overdose of Melanotan II causes muscle breakdown