PT-141 is a synthetic peptide analogue of α-melanocyte-stimulating hormone (α-MSH), also referred to as bremelanotide, its generic clinical name. The peptide engages the melanocortin receptors, binding primarily to MC-4R, which is involved in the regulation of metabolism, sexual behavior, and male erectile function.
While bremelanotide is already an FDA-approved treatment for hypoactive sexual desire disorder in women, peptide researchers are actively investigating the compound for its effects on male sexual function and as a treatment alternative to medications like Viagra and Cialis.