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 Melanotan Nasal Spray Bottle Close Up Melanotan II Spray (10mg Per Bottle) Modified Aminos Most peptides don't work well when taken by mouth because your stomach breaks them down before they can help your body. Peptides are like tiny protein messages, and they usually need to