Comparison
Cetrorelix vs. Icatibant
Two peptides side-by-side — identity, evidence base, legal status and known adverse events.
Identity
Category
Research other
Research other
CAS no.
120287-85-6
138614-30-9
Molecular weight
1431.06 g/mol
1304.52 g/mol
Half-life
no data
no data
Sequence
no data
no data
Mechanism of action
Cetrorelix
Cetrorelix competitively and immediately blocks the pituitary GnRH receptor, rapidly suppressing LH and FSH release — without the initial hormone surge ('flare') of GnRH agonists.
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.
Evidence base
Highest evidence
Human RCT
Human RCT
Studies
0
1
of which in humans
0
1
Effects recorded
2
1
Open conflicts
0
0
Documented adverse events
1
1
Legal status
Full entries
Frequently asked questions
- What is the difference between Cetrorelix and Icatibant?
- Cetrorelix is classified as "Research other", while Icatibant is classified as "Research other". Cetrorelix: Cetrorelix is a synthetic decapeptide and GnRH antagonist. It is used in assisted reproduction (IVF) to prevent a premature LH surge during controlled ovarian stimulation. 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). This page contrasts both neutrally and source-based — with no usage or dosing recommendation.
- Which peptide is better supported by science, Cetrorelix or Icatibant?
- The highest available evidence level is "Human RCT" for Cetrorelix and "Human RCT" for Icatibant. 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 Cetrorelix and Icatibant in Germany and the United States?
- Germany: Cetrorelix — Prescription, Icatibant — Prescription. United States: Cetrorelix — Prescription, Icatibant — Prescription. These are factual summaries with source and review date on the individual pages.