Bremelanotide is a real, FDA-approved melanocortin receptor agonist for hypoactive sexual desire disorder — and also one of the most heavily grey-marketed peptides in circulation, sold as "PT-141" nasal sprays and vials with no prescription and no oversight. Both facts are true at once, and the gap between them is worth understanding on its own mechanistic terms.
Pt-141
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PT-141 (Bremelanotide) and the Arousal Pathway