PT-141
 
PT-141 or Bremelanotide is the generic term for a peptide being studied for its possible use in helping to improve sexual dysfunction in both men (erectile dysfunction or impotence) and women (sexual arousal disorder). PT-141 has a similar structure to Melanotan-II and is a synthetic analogue of alpha-Melanocyte stimulating hormone (α-MSH). Alpha-MSH is an endogenous peptide that has potential influence over lipid metabolism, appetite, and sexual libido. PT-141 is a potential remedy for the treatment of sexual dysfunction and studies have shown that PT-141 does not act on the vascular system like former compounds, but allegedly works by activating melanocortin receptors in the brain, therefore helping increase ones sexual stimulation. PT-141 is a melanocortin based peptide that has shown effectiveness in clinical studies on both male and female rats. PT-141 was developed from the Melanotan-II Peptide, which underwent testing as a sunless tanning agent.