Comparison
Cetrorelix vs. Selank
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
129954-34-3
Molecular weight
1431.06 g/mol
751.85 g/mol
Half-life
no data
0.3 h
Sequence
no data
Thr-Lys-Pro-Arg-Pro-Gly-ProMechanism 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.
Selank
Selank is a glyproline-tuftsin analog. Proposed mechanisms include modulation of the GABAergic system, effects on serotonin bioavailability, and influence on enkephalinases. Animal studies show anxiolytic and neuroprotective markers; a clear receptor target is not established.
Evidence base
Highest evidence
Human RCT
Human trial
Studies
0
4
of which in humans
0
2
Effects recorded
2
3
Open conflicts
0
1
Documented adverse events
1
1
Legal status
Full entries
Frequently asked questions
- What is the difference between Cetrorelix and Selank?
- Cetrorelix is classified as "Research other", while Selank 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. Selank: Synthetic heptapeptide derived from natural tuftsin. Approved as an anxiolytic (Selank) in Russia and some CIS states. Western phase-3 trials are absent; efficacy assessment relies on Russian research literature. This page contrasts both neutrally and source-based — with no usage or dosing recommendation.
- Which peptide is better supported by science, Cetrorelix or Selank?
- The highest available evidence level is "Human RCT" for Cetrorelix and "Human trial" for Selank. 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 Selank in Germany and the United States?
- Germany: Cetrorelix — Prescription, Selank — Unapproved. United States: Cetrorelix — Prescription, Selank — Unapproved. These are factual summaries with source and review date on the individual pages.