How long does PT-141 take to work?

The best timing data come from the approved drug, Vyleesi. After a subcutaneous dose, bremelanotide reaches peak blood levels in about one hour and has a half-life of roughly 2.7 hours, according to its prescribing information. Blood pressure rose briefly after each dose and usually returned to baseline within 12 hours. Pharmacokinetics in men or by other routes may differ.

Those figures describe a specific, FDA-reviewed formulation, not research powder, and we give no protocols. In female rats, Pfaus et al. (2004) used behavior tests to show that melanocortin activation increased solicitation, a measure of sexual motivation. Our vial holds 10 mg of lyophilized PT-141 at 1025.18 g/mol, and it’s sold for laboratory research only. See the specs for our PT 141 Peptide.