Sermorelin vs. Other Peptides: What Is the Difference? Ipamorelin is a potent growth hormone releasing peptide that has some potential advantages over some of the others. Although peptides seem to be doled out like aspirin, keep in mind that these are Drug Insight: prolactin receptor antagonists, a novel approach to treatment of unresolved systemic and local hyperprolactinemia? Nature Reviews Endocrinology Managing Hyperprolactinemia and Sexual Side Effects from Antipsychotic Use Psychopharmacology Institute