Clinical data
Routes of
Intravenous, subcutaneous
ATC code None
Pharmacokinetic data
Biological half-life 2 hours[1]
CAS Number 170851-70-4
PubChem (CID) 20754357
ChemSpider 8007390
Chemical and physical data
Formula C38H49N9O5
Molar mass 711.85296 g/mol
3D model (Jmol) Interactive image

Ipamorelin (INN) (developmental code name NNC 26-0161) is a peptide selective agonist of the ghrelin/growth hormone secretagogue receptor (GHS) and a growth hormone secretagogue.[2][3] It is a pentapeptide with the amino acid sequence Aib-His-D-2-Nal-D-Phe-Lys-NH2 that was derived from GHRP-1.[4]

Ipamorelin significantly increases plasma growth hormone (GH) levels in both animals and humans.[1][3][5] In addition, ipamorelin stimulates body weight gain in animals.[5] Like pralmorelin and GHRP-6, ipamorelin does not affect prolactin, follicle-stimulating hormone (FSH), luteinizing hormone (LH), or thyroid-stimulating hormone (TSH) levels.[3] However, unlike pralmorelin (GHRP-2) and GHRP-6, but similarly to growth hormone-releasing hormone (GHRH), ipamorelin does not stimulate the secretion of adrenocorticotropic hormone (ACTH) or cortisol, and is highly selective for inducing the secretion only of GH.[3]

Ipamorelin was originally developed by Novo Nordisk, and was investigated in phase II clinical trials by Helsinn Therapeutics for the treatment of postoperative ileus, but was discontinued due to lack of efficacy.[6][7]

See also


  1. 1 2 Gobburu, Jogarao V. S.; Agersø, Henrik; Jusko, William J.; Ynddal, Lars (1999). "Pharmacokinetic-Pharmacodynamic Modeling of Ipamorelin, a Growth Hormone Releasing Peptide, in Human Volunteers". Pharmaceutical Research. 16 (9): 1412–1416. doi:10.1023/A:1018955126402. ISSN 0724-8741.
  2. Moulin, Aline; Ryan, Joanne; Martinez, Jean; Fehrentz, Jean-Alain (2007). "Recent Developments in Ghrelin Receptor Ligands". ChemMedChem. 2 (9): 1242–1259. doi:10.1002/cmdc.200700015. ISSN 1860-7179. PMID 17520591.
  3. 1 2 3 4 Raun, K; Hansen, B.; Johansen, N.; Thogersen, H; Madsen, K; Ankersen, M; Andersen, P. (1998). "Ipamorelin, the first selective growth hormone secretagogue". European Journal of Endocrinology. 139 (5): 552–561. doi:10.1530/eje.0.1390552. ISSN 0804-4643.
  4. Isidro, Maria; Cordido, Fernando (2006). "Growth Hormone Secretagogues". Combinatorial Chemistry & High Throughput Screening. 9 (3): 175–180. doi:10.2174/138620706776055458. ISSN 1386-2073.
  5. 1 2 Estrada, R. Cañete; Jiménez-Reina, L.; de la Torre, M.J.; Bernal, J. (2002). "Chronic In Vivo Ipamorelin Treatment Stimulates Body Weight Gain and Growth Hormone (GH) Release In Vitro in Young Female Rats". 6 (1): 37–46. ISSN 1136-4890.
  6. Beck, David E.; Sweeney, W. Brian; McCarter, Martin D. (2014). "Prospective, randomized, controlled, proof-of-concept study of the Ghrelin mimetic ipamorelin for the management of postoperative ileus in bowel resection patients". International Journal of Colorectal Disease. 29 (12): 1527–1534. doi:10.1007/s00384-014-2030-8. ISSN 0179-1958.
  7. AdisInsight. "Ipamorelin". Retrieved 10 June 2015.

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