Health warning over 'dangerous' self tan product after increase in ads PDF) Increasing illegal use of Melanotan: The Barbie drug hype Background Experts lash use of popular social media sun tanning drug Melanotan The sale of nasal tanning sprays continues to soar across the UK, despite being illegal and unregulated., They contain the chemical Melanotan II, an artificial hormone that enters the bloodstream and A Current Affair: Tanning 'Barbie drug' a danger to users, experts say