A Current Affair: Tanning 'Barbie drug' a danger to users, experts say Melanotan Nasal Spray Side Effects and Dangers Melanotic macule of nail unit and its clinicopathologic spectrum ScienceDirect Happy Wednesday! , In this video, a patients labial melanotic macule (a benign pigmented lesion) is being treated with liquid nitrogen. Labial melanotic macules are flat and asymmetrical with a 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 (Tan Jabs): Why They're Not Worth The Risk