How Long Does It Take For Melanotan To Work? Melanotan peptide might seem like the cool thing to doit makes you look tan., But these unregulated injections come with real risks., They can cause unpredictable skin changes, including darkening of Dying for a tan: The rise in sunbed use with melanotan, the illegal nasal spray that boosts tan with serious side effects Irish Independent Figure 4 from Changes of melanocytic lesions inducedby Melanotan injections and sun bed use ina teenage patient with FAMMM syndrome Semantic Scholar