Comparison
Icatibant vs. Leuprorelin
Two peptides side-by-side — identity, evidence base, legal status and known adverse events.
Identity
Category
Research other
Research other
CAS no.
138614-30-9
53714-56-0
Molecular weight
1304.52 g/mol
1209.4 g/mol
Half-life
no data
3 h
Sequence
no data
Pyr-His-Trp-Ser-Tyr-D-Leu-Leu-Arg-Pro-NHEtMechanism of action
Icatibant
Icatibant competitively blocks the bradykinin B2 receptor. Because bradykinin mediates the vascular permeability, swelling and pain typical of hereditary angioedema, the blockade interrupts the acute attack.
Leuprorelin
Leuprorelin is a GnRH-receptor agonist. After binding to pituitary GnRH receptors, it first causes a transient surge in luteinizing hormone (LH) and follicle-stimulating hormone (FSH) release — the so-called flare. With continuous, non-pulsatile exposure the receptors are downregulated and desensitized, suppressing gonadotropin secretion and consequently lowering sex steroids (testosterone or estradiol) to low levels. This mechanism underlies the literature-described use in hormone-dependent conditions.
Evidence base
Highest evidence
Human RCT
Human RCT
Studies
1
4
of which in humans
1
4
Effects recorded
1
4
Open conflicts
0
1
Documented adverse events
1
3
Legal status
Full entries
Frequently asked questions
- What is the difference between Icatibant and Leuprorelin?
- Icatibant is classified as "Research other", while Leuprorelin is classified as "Research other". Icatibant: Icatibant is a synthetic decapeptide and selective antagonist of the bradykinin B2 receptor. It is approved to treat acute attacks of hereditary angioedema (HAE). Leuprorelin: Leuprorelin (also leuprolide) is a synthetic nonapeptide analogue of gonadotropin-releasing hormone (GnRH/LHRH). It is an approved prescription medicine in several jurisdictions, including for advanced prostate cancer, endometriosis, uterine fibroids and central precocious puberty. This page neutrally summarizes the evidence base and legal status and is not a usage or dosing recommendation. This page contrasts both neutrally and source-based — with no usage or dosing recommendation.
- Which peptide is better supported by science, Icatibant or Leuprorelin?
- The highest available evidence level is "Human RCT" for Icatibant and "Human RCT" for Leuprorelin. A higher evidence level means more robust data, but says nothing about suitability for an individual. The full body of evidence is on each peptide's own page.
- What is the legal status of Icatibant and Leuprorelin in Germany and the United States?
- Germany: Icatibant — Prescription, Leuprorelin — Prescription. United States: Icatibant — Prescription, Leuprorelin — Prescription. These are factual summaries with source and review date on the individual pages.