PT 141, scientifically referred to as Bremelanotide, is a synthetic peptide developed through extensive structural modification of the naturally occurring alpha melanocyte stimulating hormone (a MSH). This peptide has gained considerable interest The Best Peptide for Erectile Dysfunction: What PT 141 Offers (and Where It Falls Short) PT 141 Injections vs Nasal Spray: Which is Right for You? Invigor Medical Double blind, placebo controlled evaluation of the safety, pharmacokinetic properties and pharmacodynamic effects of intranasal PT 141, a melanocortin receptor agonist, in healthy males and patients with mild to moderate erectile dysfunction PT 141 Therapy for Low Libido in Beverly Hills Jennifer R. Berman MD Bremelanotide PT 141 Erectile Dysfunction Men Randomized Trial: What the Evidence Shows