Change in moles linked to use of unlicensed sun tan jab The BMJ Health expert says Melanotan II darkens skin moles and can make melanoma hard to detect Herald Sun Avoid nasal tanning sprays or nasal tanners entirely. These products can produce nasty side effects, such as nausea and vomiting, high blood pressure, respiratory issues, and even links to skin cancer. Nasal What are 'melanotan' injections? Explaining the controversial tanning drug Dazed