Comparison
Bremelanotide vs. Terlipressin
Two peptides side-by-side — identity, evidence base, legal status and known adverse events.
Identity
Category
Research other
Research other
CAS no.
189691-06-3
14636-12-5
Molecular weight
1025.18 g/mol
1227.37 g/mol
Half-life
2.7 h
no data
Sequence
Ac-Nle-c[Asp-His-D-Phe-Arg-Trp-Lys]-OHno data
Mechanism of action
Bremelanotide
Bremelanotide is a cyclic peptide that binds non-selectively to melanocortin receptors (MC1R through MC5R) — with highest affinity at MC4R in the central nervous system. The precise role of MC4R activation in sexual behaviour is not fully understood; animal data show effects on hypothalamic circuits. Peripheral effects (blood pressure, hyperpigmentation) are attributed to MC1R/MC2R.
Terlipressin
Terlipressin is slowly converted in the body to lysine-vasopressin by cleavage of the three N-terminal glycyl residues (reservoir effect) and activates V1 receptors. The splanchnic vasoconstriction improves renal perfusion in hepatorenal syndrome.
Evidence base
Highest evidence
Human RCT
Human RCT
Studies
5
1
of which in humans
5
1
Effects recorded
3
2
Open conflicts
1
0
Documented adverse events
2
1
Legal status
Full entries
Frequently asked questions
- What is the difference between Bremelanotide and Terlipressin?
- Bremelanotide is classified as "Research other", while Terlipressin is classified as "Research other". Bremelanotide: Synthetic cyclic heptapeptide acting as a non-selective melanocortin-receptor agonist. FDA-approved in 2019 as Vyleesi for hypoactive sexual desire disorder (HSDD) in pre-menopausal women. Terlipressin: Terlipressin is a 12-amino-acid vasopressin analog and prodrug of lysine-vasopressin. As a V1 receptor agonist it is vasoconstrictive and is approved for hepatorenal syndrome (FDA 2022, Terlivaz). This page contrasts both neutrally and source-based — with no usage or dosing recommendation.
- Which peptide is better supported by science, Bremelanotide or Terlipressin?
- The highest available evidence level is "Human RCT" for Bremelanotide and "Human RCT" for Terlipressin. 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 Bremelanotide and Terlipressin in Germany and the United States?
- Germany: Bremelanotide — Unapproved, Terlipressin — Prescription. United States: Bremelanotide — Prescription, Terlipressin — Prescription. These are factual summaries with source and review date on the individual pages.