At a glance
- Type
- Natural peptide hormone
- Human evidence
- FDA-approved Approved by the FDA for specific uses after large clinical trials.
- FDA status
- FDA-approved injection (Pitocin, generics) for labor and after delivery; no approved nasal product marketed (as of November 12, 2026)
- How it is given
- Injection into a vein or muscle (as labeled); nasal spray (as studied)
Oxytocin is a natural hormone. Its only FDA-approved use is as a hospital injection around childbirth. This page explains that approved use and what research shows about nasal oxytocin for trust and sex. It is general information, not advice for your situation.
What it is and how it works
Oxytocin is a small peptide, nine amino acids long, made by the pituitary gland. The drug version (Pitocin and generics) is made in a lab.1 It acts on oxytocin receptors in the uterus, breast and brain. Its best-known job is making the uterus contract. At high doses it also makes the body hold on to water.1
It lasts only minutes in the blood, about 1 to 6 minutes.1
What the research shows (and where evidence is weak)
Approved use. Oxytocin injection has long been used in hospitals during and after childbirth.1 We did not review the trials behind that use.
Trust and bonding. A famous 2005 study suggested nasal oxytocin increased trust. It has not held up:
- A large, pre-registered repeat study (planned and published in advance), which included one of the original authors, found no effect on trust.2
- A 2026 repeat study, pooled with earlier data on 532 people, found no evidence that oxytocin increases trust, and any effect was too small to matter.3
- A 2015 critical review concluded the evidence does not reliably link oxytocin to trust.4
Sex. Trials of nasal oxytocin are small and mostly negative:
- In a trial of 30 women with sexual problems over 8 weeks, sexual function scores improved about the same with oxytocin and with placebo.5
- In a lab study of 27 healthy women, oxytocin did not change sexual function or drive.6
- In 29 healthy couples, oxytocin did not change desire, arousal, erection or lubrication. It was linked to small-to-moderate effects on orgasm intensity and contentment after sex.7
- A 2026 review of peptides for male sexual problems found mixed results, with no consistent improvement in erections or ejaculation.8
These studies are small and short, and placebo responses were strong.
FDA and regulatory status
Oxytocin injection (Pitocin and generics) is FDA-approved for hospital use:19
- to start labor when there is a medical reason
- to strengthen labor in selected cases
- to help manage an incomplete or unavoidable miscarriage
- to cause contractions and control bleeding after delivery
The label states it is not approved to start labor by choice (elective induction). For labor, it must be given by IV drip in a hospital with medical supervision.1
As of November 12, 2026, there is no FDA-approved oxytocin nasal product on the U.S. market. A nasal product called Syntocinon is listed as discontinued.9 Oxytocin is not on FDA’s list of compounding ingredients with significant safety risks (as of April 22, 2026).10 If a provider offers an oxytocin nasal spray, ask where it is made and whether it is a compounded product.
See our guide to compounded vs. FDA-approved peptides.
Common side effects and safety
The injection’s label lists serious risks, especially with too much of the drug:1
- overly strong or constant contractions, and tearing (rupture) of the uterus
- distress in the baby
- water intoxication, meaning the body holds on to too much water, which has caused seizures, coma and death in mothers
Nasal sprays sold today are not FDA-approved products. The long-term safety of using them has not been established in the sources reviewed for this page.
Typical cost range
The approved injection is used in hospitals, so it is usually part of a hospital bill. This research found no reliable price data for nasal sprays. Cost would depend on the source, your insurance and visit fees. Ask any provider or pharmacy for a written price breakdown before you start.
Questions to ask a provider
- What problem are we trying to address, and is there an FDA-approved treatment for it?
- If you suggest a nasal spray, where is it made, and is it FDA-approved?
- What evidence supports nasal oxytocin for my situation, given the mixed trial results?
- What side effects should I watch for, and how will we check whether it helps?
For more, see the sexual health goal page and our first consultation guide.
Footnotes
-
Par Health USA. PITOCIN (oxytocin injection, USP) prescribing information. DailyMed. Revised March 2026. Accessed November 2026. https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=6e5a66fc-e507-497c-b5ce-44a8c95898ad ↩ ↩2 ↩3 ↩4 ↩5 ↩6 ↩7
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Declerck CH, Boone C, Pauwels L, et al. A registered replication study on oxytocin and trust. Nat Hum Behav. 2020;4(6):646-655. https://doi.org/10.1038/s41562-020-0878-x ↩
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Kroll CF, Schruers KRJ, Viechtbauer W, et al. Absence of a meaningful effect of intranasal oxytocin on trusting behavior: a registered report with pooled equivalence testing. Cortex. 2026;198:208-233. https://doi.org/10.1016/j.cortex.2026.03.006 ↩
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Muin DA, Wolzt M, Marculescu R, et al. Effect of long-term intranasal oxytocin on sexual dysfunction in premenopausal and postmenopausal women: a randomized trial. Fertil Steril. 2015;104(3):715-723.e4. https://doi.org/10.1016/j.fertnstert.2015.06.010 ↩
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Kruger THC, Deiter F, Zhang Y, et al. Effects of intranasal oxytocin administration on sexual functions in healthy women: a laboratory paradigm. J Clin Psychopharmacol. 2018;38(3):239-242. https://doi.org/10.1097/JCP.0000000000000863 ↩
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Behnia B, Heinrichs M, Bergmann W, et al. Differential effects of intranasal oxytocin on sexual experiences and partner interactions in couples. Horm Behav. 2014;65(3):308-318. https://doi.org/10.1016/j.yhbeh.2014.01.009 ↩
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Ramez M, Mostafa MM, Mohamed H, et al. Peptides for male sexual dysfunction: a systematic review of emerging evidence. J Sex Med. 2026;23(12):qdag338. https://doi.org/10.1093/jsxmed/qdag338 ↩
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U.S. Food and Drug Administration. Drugs@FDA data (openFDA drugsfda endpoint): oxytocin. Data updated November 12, 2026. Accessed November 2026. https://api.fda.gov/drug/drugsfda.json ↩ ↩2
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U.S. Food and Drug Administration. Certain bulk drug substances for use in compounding that may present significant safety risks. Content current as of April 22, 2026. Accessed November 2026. https://www.fda.gov/drugs/human-drug-compounding/certain-bulk-drug-substances-use-compounding-may-present-significant-safety-risks ↩
Frequently asked questions
Is oxytocin FDA-approved?
Yes, but only as an injection given in the hospital around childbirth, such as to start or strengthen labor for a medical reason or to control bleeding after delivery. There is no FDA-approved oxytocin nasal spray on the U.S. market.
Does oxytocin nasal spray increase trust or bonding?
Large, carefully planned repeat studies did not find that nasal oxytocin increases trust. The famous early finding has not held up.
Does oxytocin improve sex?
Small trials are mixed and mostly negative. In one trial in women, oxytocin worked no better than placebo. A study of couples found small effects on orgasm intensity and contentment, but not on desire or arousal.
What are the risks of oxytocin?
The approved injection can cause serious harm if misused, including overly strong contractions, a torn uterus, distress in the baby and dangerous water retention. The long-term safety of nasal sprays has not been established.
Questions? Talk to a licensed provider
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