The Peptide Directory

FDA-approvedNeuropeptide hormoneLabor inductionsocial research

Oxytocin

Oxytocin is a nine-amino-acid hormone made in the hypothalamus; synthetic oxytocin (Pitocin) is FDA-approved to induce or strengthen labor.

Last reviewed by The Peptide Directory Editorial Team

What is Oxytocin?

Oxytocin is a nine-amino-acid hormone made in the hypothalamus; synthetic oxytocin (Pitocin) is FDA-approved to induce or strengthen labor. Oxytocin is an FDA-approved prescription medicine (OXYTOCIN, PITOCIN); "research use only" vials sold online are not the approved product.

Oxytocin is a cyclic nonapeptide hormone with amino acid sequence CYIQNCPLG that also acts as a neurotransmitter in the brain; the principal uterine-contracting and milk-ejecting hormone of the posterior pituitary. Together with the neuropeptide vasopressin, it is believed to influence social cognition and behaviour. It has a role as a vasodilator agent and an oxytocic. It is a heterodetic cyclic peptide and a peptide hormone.

Key takeaways

  1. Oxytocin is an FDA-approved prescription medicine (OXYTOCIN, PITOCIN); "research use only" vials sold online are not the approved product.
  2. PubMed indexes 29,398 papers on Oxytocin (2,422 tagged as clinical trials) as of October 19, 2026.
  3. ClinicalTrials.gov lists 935 registered studies using Oxytocin.
  4. 24 vendors in our directory listed Oxytocin in their public catalog on October 19, 2026.

Structure

2D chemical structure of Oxytocin (C43H66N12O12S2), as depicted by PubChem
Structure: PubChem CID 439302 (C43H66N12O12S2, 1,007.2 g/mol). 2D depiction from NCBI PubChem, retrieved October 19, 2026.

Regulatory & access status

Oxytocin is an FDA-approved prescription medicine (OXYTOCIN, PITOCIN); "research use only" vials sold online are not the approved product.

  • OXYTOCIN — HIKMA FARMACEUTICA, application ANDA200219 (prescription). Drugs@FDA
  • OXYTOCIN — FRESENIUS KABI USA, application NDA018248 (prescription). Drugs@FDA
  • PITOCIN — PH HEALTH, application NDA018261 (prescription). Drugs@FDA

Sellers that market unapproved peptides for human use can receive FDA warning letters; our vendor directory links any letter we found on fda.gov.

How much research exists on Oxytocin?

PubMed indexes 29,398 papers mentioning Oxytocin in the title or abstract, 5,736 of them from the last five years and 2,422 tagged as clinical trials (search run October 19, 2026; repeat the search).

Most relevant recent papers

Registered clinical studies

ClinicalTrials.gov lists 935 studies with Oxytocin as an intervention (see all). Most recent:

What the evidence does not show

  • Paper counts measure research attention, not whether Oxytocin works or is safe.

Research suppliers that list Oxytocin

24 vendors in our directory listed a product matching Oxytocin in their public catalog on October 19, 2026. Listed alphabetically; a listing is not an endorsement. Research use only.

Prices per mg, where we could verify them, are on our price comparison.

Oxytocin reconstitution math

Lab arithmetic only, not dosing guidance: vial-by-vial concentration tables are on Oxytocin 5 mg vial math.

Oxytocin FAQ

Is Oxytocin FDA-approved?

Oxytocin is an FDA-approved prescription medicine (OXYTOCIN, PITOCIN); "research use only" vials sold online are not the approved product.

Is Oxytocin safe?

Safety data come from the published studies listed on this page; read them in full. Products sold as "research use only" have no FDA review of their purity, sterility or dose.

How much research is there on Oxytocin?

PubMed indexes 29,398 papers on Oxytocin (2,422 tagged as clinical trials) as of October 19, 2026.

Who sells Oxytocin?

Ascension Peptides, Atomik Labz, BioGenix Peptides, BioLongevity Labs, Biotech Peptides, Core Peptides and 18 more listed it on their public catalogs when we checked; a listing is not an endorsement.

Related compounds

hCGVIPTriptorelinCerebrolysinDSIPKisspeptin-10GonadorelinSemaxAll cognitive, neuro & sleepAll sexual & reproductive health