What is Melanotan II the drug that the TGA urges consumers to avoid? 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 Nasal tanning sprays linked to skin cancer, trading standards officers warn Consumer affairs The Guardian