Comparison
Linaclotid vs. Oxytocin
Two peptides side-by-side — identity, evidence base, legal status and known adverse events.
Identity
Category
Research other
Research other
CAS no.
851199-59-2
50-56-6
Molecular weight
1526.74 g/mol
1007.19 g/mol
Half-life
no data
0.05 h
Sequence
no data
Cys-Tyr-Ile-Gln-Asn-Cys-Pro-Leu-Gly-NH2Mechanism of action
Linaclotid
Linaclotide activates the guanylate cyclase-C receptor on the luminal surface of the intestinal epithelium. This raises cyclic GMP (cGMP), increases secretion of chloride and bicarbonate into the lumen, raises stool fluid content and accelerates transit; pain signaling is also modulated.
Oxytocin
Oxytocin is synthesised in the hypothalamus and released via the posterior pituitary. Peripherally it binds the oxytocin receptor, a G-protein-coupled receptor, and through the phospholipase-C cascade and calcium release triggers contraction of uterine smooth muscle and milk ejection — the pharmacological basis of the obstetric approval. Centrally, oxytocin acts as a neuromodulator and has been linked to social bonding, trust and modulation of stress and anxiety circuits. Its central effects in humans are mechanistically incompletely understood, particularly because it is unclear to what extent peripherally or intranasally administered oxytocin crosses the blood-brain barrier.
Evidence base
Highest evidence
Human RCT
Human RCT
Studies
0
4
of which in humans
0
4
Effects recorded
2
3
Open conflicts
0
1
Documented adverse events
1
0
Legal status
Full entries
Frequently asked questions
- What is the difference between Linaclotid and Oxytocin?
- Linaclotid is classified as "Research other", while Oxytocin is classified as "Research other". Linaclotid: Linaclotide is a 14-amino-acid peptide and guanylate cyclase-C (GC-C) agonist. It is approved for irritable bowel syndrome with constipation (IBS-C) and chronic idiopathic constipation (CIC). Oxytocin: Oxytocin is an endogenous nonapeptide hormone of the posterior pituitary. In synthetic form (Pitocin, Syntocinon) it has been approved for decades to induce and augment labour and to control postpartum uterine bleeding. Strictly separate from this is intranasal use to influence social behaviour, trust, anxiety or autism symptoms: this use is unapproved, purely experimental, and yields inconsistent and often negative results in controlled trials. This page contrasts both neutrally and source-based — with no usage or dosing recommendation.
- Which peptide is better supported by science, Linaclotid or Oxytocin?
- The highest available evidence level is "Human RCT" for Linaclotid and "Human RCT" for Oxytocin. 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 Linaclotid and Oxytocin in Germany and the United States?
- Germany: Linaclotid — Prescription, Oxytocin — Prescription. United States: Linaclotid — Prescription, Oxytocin — Prescription. These are factual summaries with source and review date on the individual pages.