Some human trialsFDA approved as Pitocin +1

Oxytocin side effects

Also known as: Pitocin · Syntocinon · Love hormone · Oxytocin nasal spray · Oxytocin acetate

Updated Oct 24, 202622 sources

11 side effects reported for Oxytocin: 4 from studies and labels, 7 from users and guides. 2 come with the ways people manage them.

Oxytocin overview

Side effects reported in studies and labels

Rates as each trial or label states them. A rate from one trial does not carry over to research-grade vials or other doses.

From trials and regulators4

Clinical studies and regulatory documents.

Few side effects at research nasal doses
A review of 38 trials found side effects no different from placebo at 18 to 40 IU short term
Adverse events over months of daily use
Similar to placebo in 290 children over 24 weeks and in 61 adults over 8 weeks, with no serious events in the adult trial
Water intoxication and low sodium
Pitocin label: a serious risk with large IV doses (40 to 50 milliunits per minute) given for long periods; deaths have been reported in obstetric use
How people manage it
- Do not drink large amounts of water around high or frequent doses.
- Seizures, confusion or severe headache need emergency care.
Uterine overstimulation in pregnancy
Pitocin label: excess dose can cause hypertonic or tetanic contractions or uterine rupture

Side effects users and guides report

What people post and what dosing guides list. These are reports, not measured rates.

From users and guides7

Community reports, competitor and vendor guides, media.

Nasal irritation
Listed as common by dosing guides; mostly from the spray itself
How people manage it
- Aim the spray at the inside of the nose, not the throat, per one guide.
Headache
Transient headache is listed by guides and is among the most logged effects in app data
Flushing
Mild flushing listed by one guide
Increased thirst
The most commonly reported physical side effect in community posts
Strong emotional sensitivity
Commonly reported in community posts; some like it, others find it overwhelming
No noticeable effect
A notable share of community users report no change
Nausea and anxiety
Among the most logged side effects by PeptIQ app users, alongside headache

Who should avoid it, and what not to combine

Pregnancy (outside supervised obstetric use)Condition
Oxytocin makes the uterus contract; the label limits use to monitored hospital settings.
Low sodium or heavy fluid intakeCondition
Oxytocin holds water like vasopressin; the label warns of water intoxication with long infusions while drinking fluids.

How much is known

Some human trials

Strong for the approved obstetric uses. For the uses people buy it for, the record is large but thin on payoff: 38 small trials at 18 to 40 IU showed few side effects; the largest autism trial (290 children), an 8-week obesity trial (61 adults) and an 8-week trial in women with sexual dysfunction (30) all matched placebo. A couples study found small orgasm and afterglow effects. Compounded and research products have no trial data of their own.