PT 141 (Bremelanotide) is a synthetic peptide developed from Melanotan 2 (MT II). PT 141 was recently approved for the treatment of HSDD (hypoactive sexual desire disorder) in women. PT 141 is a peptide that was PT 141 10MG Research Peptide Alpha Omega Peptides PT 141 10MG Peptide for Laboratory Studies PT 141 Crescent Chems Research PT 141 Side Effects: What You Need to Know Before Starting