Melanotan (MT) II Melanocortin Receptor Agonist MedChemExpress 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 Risks of Melanotan: TGA to issue fresh warning against 'Barbie drug' The Australian Melanotan II (Tan Jabs): Why They're Not Worth The Risk 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 longer lasting than Who's tan is reay for summer. This peptide can help.