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