Bremelanotide (PT-141) is a melanocortin receptor agonist peptide.  Melanocortin is a natural hormone in your body that works on receptors in your brain & nervous system to cause sexual arousal & influence sexual behavior. 
 
Potential Benefits Include:  Improves sex drive for those with low libido
Helps increase sexually satisfying experiences
Unlike Viagra & other related medications, it does NOT act upon the vascular system
Improved confidence & self esteem
Stimulates the Immune system
Potentially lowers blood sugar
Decreases fat storage