Oxytocin vs Carbetocin (intranasal)
Written by Aaron CuhaReviewed Sep 2026
The short answer
The hormone, and the long acting copy taken into mental health trials. Both large final stage trials of carbetocin nose spray in Prader-Willi syndrome missed their main goal. The confirming trial found a gap of 0.3 points on the overeating score, which could easily be chance, and the best guess actually favoured the dummy spray. The follow on study was stopped because it was unlikely to show a benefit.
- Oxytocin people
- 290
- Oxytocin nulls
- 1
- Carbetocin (intranasal) people
- 343
- Carbetocin (intranasal) nulls
- 1
Dose
Approved medicine. No human dose established for unlabelled uses
Labeled amounts sit on the prescribing information. This page records what trials measured, not a personal dose.
FDA-approved (Pitocin) for use in labor and childbirth; uses for behavior are investigational
Dose
No human dose established
Amounts that were given in studies sit in Human evidence on this page. None of them is a personal dose.
3 completed trials, 343 people given it
First-hand reports are counted on each profile and never added together. This page sets two published records side by side. It does not pick a winner.
Column A
OxytocinOxytocin
A natural hormone that is FDA-approved to help with childbirth. It is also studied, with mixed results, for social, bonding and mental health effects.
Column B
Carbetocin (intranasal)Intranasal carbetocin, a long-acting oxytocin receptor agonist
A failed drug program, and this page says so. Both large final-stage studies in Prader-Willi syndrome missed their main goal. In the check study, hunger scores differed by just 0.3 points between the nasal spray and a dummy spray, with the dummy slightly ahead. The company then stopped its own follow-on study because carrying on was not likely to help.
Side by side, on the facts we can check
| What we compare | Oxytocin | Carbetocin (intranasal) |
|---|---|---|
| Category | Hormone | Nootropic & CNS |
| FDA status | FDA-approved (Pitocin) for use in labor and childbirth; uses for behavior are investigational | Not approved. A search of the FDA's public drug-label database for carbetocin finds nothing, which fits with there being no approved US product. The final-stage follow-up study failed and the extension study was stopped. So the nasal spray version has no active path to approval. |
| Half-life | ~1-6 minutes | Longer than oxytocin, which is the stated design rationale for using this analogue rather than oxytocin. No specific human intranasal figure is asserted here because none was resolved in this pass. |
| Molecular weight | 1,007.2 Da | Not reported |
| How it works | It switches on oxytocin receptors. In the womb, that causes contractions. In the breast, it lets milk flow. In the brain, it changes how people process social and emotional cues. | Carbetocin does turn on the oxytocin receptor. It is more selective and lasts longer than oxytocin, which is the whole point of the molecule. What was a guess was the next step: that turning on this receptor would calm the extreme hunger of Prader-Willi syndrome. Two well-run large studies tested that guess, and it did not hold. The chemistry works. The treatment idea built on it failed. |
| Studies in people | 2 | 4 |
| Evidence | Moderate: 2 completed trials, 290 people given it | Moderate: 3 completed trials, 343 people given it |
| Legal status, US | FDA-approved, prescription only | Investigational, not approved |
Frequently asked questions
What is the difference between Oxytocin and Carbetocin (intranasal)?
Oxytocin: A natural hormone that is FDA-approved to help with childbirth. It is also studied, with mixed results, for social, bonding and mental health effects. Carbetocin (intranasal): A failed drug program, and this page says so. Both large final-stage studies in Prader-Willi syndrome missed their main goal. In the check study, hunger scores differed by just 0.3 points between the nasal spray and a dummy spray, with the dummy slightly ahead. The company then stopped its own follow-on study because carrying on was not likely to help.
Which has stronger research evidence, Oxytocin or Carbetocin (intranasal)?
Each compound gets a band worked out from facts we counted, with the math shown. Oxytocin is Moderate (2 completed trials, 290 people given it). Carbetocin (intranasal) is Moderate (3 completed trials, 343 people given it). That counts how much has been done in people. It does not rate whether either one works, and neither one is called the winner.
Are Oxytocin and Carbetocin (intranasal) FDA-approved?
Oxytocin: FDA-approved (Pitocin) for use in labor and childbirth; uses for behavior are investigational. Carbetocin (intranasal): Not approved. A search of the FDA's public drug-label database for carbetocin finds nothing, which fits with there being no approved US product. The final-stage follow-up study failed and the extension study was stopped. So the nasal spray version has no active path to approval..
Reviewed Sep 2026. This page puts two published records side by side. It is for learning, and it is not medical advice. When this site shows a dose, it is the dose a trial or a clinic actually used, or what people say they did, with the source attached. None of it tells you what to take.