Sermorelin or Ipamorelin: Meaning, Differences, Benefits, Side Effects, and Which One May Be Better Managing Hyperprolactinemia and Sexual Side Effects from Antipsychotic Use Psychopharmacology Institute The Involvement of Prolactin in Stress Related Disorders Sermorelin vs. Other Peptides: What Is the Difference? Ipamorelin is a pentapeptide. Five amino acids. That's it. But three of those five don't exist in nature. The sequence: Aib His D 2 Nal D Phe Lys, with a C terminal amide. Position 1 is aminoisobutyric acid the