Melanotan II Nasal Tanning Spray Risks: Dizziness, Nausea, Skin Cancer Business Insider TikTokers using genetic disorder drug for the side effects of tanning, weight loss Experts are warning against the viral unregulated nasal tanning spray trend. #news @mayaeaglin Your body already makes a hormone that tells your skin to tan. Melanotan 2 is a synthetic peptide engineered to mimic that hormone but in a version that's more potent and Viral 'Barbie drug' for tanning can cause brain swelling and even cancer, experts warn