Home > Therapeutic Peptides > APIs > Gonadorelin Hydrochloride

If you find Creative Peptides is useful to satisfy your needs, please do not hesitate to contact us!

Gonadorelin Hydrochloride

Gonadotropin-releasing hormone; Luteinizing hormone-releasing factor; Fertagyl; Gonadoliberin; Hypocrine; Lutrefact; Relefact; Gonadorelin hydrochloride; Gonadorelin HCl; Factrel; 5-Oxo-L-prolyl-L-histidyl-L-tryptophyl-L-seryl-L-tyrosylglycyl-L-leucyl-L-arginyl-L-prolylglycinamide hydrochloride
33515-09-2 (net)
Pyr-His-Trp-Ser-Tyr-Gly-Leu-Arg-Pro-Gly-NH2 hydrochloride salt
Molecular Formula
Long-term Storage Conditions
Gonadorelin hydrochloride stimulates anterior pituitary to release the gonadotropin LH.
Gonadorelin Hydrochloride is a synthetic peptide corresponding to a hypothalamic hormone also known as LHRH or GnRH. As a single dose it stimulates the release of LH and FSH from the anterior pituitary, whereas continuous administration results in downregulation of LH and FSH levels followed by suppression of ovarian and testicular steroid biosynthesis.
Areas of Interest
Hormonal therapy

Useful Tools

Gonadorelin Hydrochloride is the chloride form of a hypothalamic peptide that stimulates the release of follicle stimulating hormone and luteinising hormone from the pituitary gland. It contains not less than 88.0% and not more than 98.0% of the peptide C55H75N17O13, calculated with reference to the anhydrous substance. It is obtained by synthesis.

Recently a patient with severe hypogonadotropic hypogonadism who was given luteinizing hormone-releasing hormone (Factrel) through an infusion pump developed a wheat-and-flare reaction at the sites of injection. Treatment with luteinizing hormone-releasing hormone was discontinued and the immune response was characterized. Skin testing by skin prick test was positive for luteinizing hormone-releasing hormone but negative for vehicle. Radioallergosorbent testing was performed with allergic (patient serum with an elevated serum immunoglobulin E concentration and allergic to inhalant allergens including ragweed pollen) and nonallergic controls. Radioallergosorbent testing was negative for luteinizing hormone-releasing hormone-reactive immunoglobulin E antibodies. Radioimmunoassay of serum of the allergic patient antibody to luteinizing hormone-releasing hormone was positive only for immunoglobulin E. Maximum binding occurred at a dilution of 1:10. Sera from nonallergic and unchallenged patients were negative. It is concluded that this patient developed hypersensitivity reactions caused by IgE antibody to luteinizing hormone-releasing hormone.

Foster, W. G., Jarrell, J. F., Dolovich, J., & YoungLai, E. V. (1989). Immunoglobulin-mediated hypersensitivity in response to long-term treatment with gonadorelin hydrochloride (Factrel) in a female patient. American journal of obstetrics and gynecology, 160(4), 979-983.

If you have any peptide synthesis requirement in mind, please do not hesitate to contact us at We will endeavor to provide highly satisfying products and services.
Customer Support & Price Inquiry
  • Please enter the code "peptides"

Useful Tools

Peptide Calculator

Abbreviation List

Peptide Glossary

Follow us on:

Copyright © 2008 - Creative Peptides. All rights reserved.


Address: 45-16 Ramsey Road, Shirley, NY 11967, USA

Tel: 1-631-624-4882

Fax: 1-631-614-7828



Tel: 44-207-097-1828