Melanotan II (Tan Jabs): Why They're Not Worth The Risk 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 Pyoderma Gangrenosum Secondary to Melanotan Cureus Nasal sprays containing the 'Barbie Drug' melanotan are very, very dangerous and completely unregulated, according to leading dermatologist. Experts say there has been a surge in the use of the illegal tanning aid