How It Works
Peptide
Mechanism
PT-141 (Bremelanotide) is a melanocortin receptor agonist that primarily activates MC4R and MC3R in the hypothalamus—brain regions governing sexual desire and arousal. Unlike PDE5 inhibitors that work peripherally on blood flow, PT-141 acts centrally to increase sexual motivation and desire. Kisspeptin modulates the HPG axis, stimulating GnRH release which increases LH and FSH, optimizing hormonal environment for sexual function.
Sexual desire originates in the brain's reward and motivation circuits, not the genitals. The melanocortin system is a key regulator of arousal, with MC4R activation directly linked to increased sexual behavior in both sexes. By targeting this central mechanism, peptides can address the psychological and neurological components of sexual dysfunction that peripheral treatments cannot reach.