Is this injectable tanning drug safe to use? Eruptive naevi and darkening of preexisting naevi 24 h after a single mono dose injection of melanotan II Semantic Scholar Melanotan is not a tan. It's an unregulated peptide with real risk. As a dermatologist, here's the reality: It has been linked to new and changing moles including cases of No, you don't need the 'Barbie drug' to tan, whatever TikTok says. Here's why melanotan II is so risky