Oxytocin dosage and protocol
Oxytocin is a nonapeptide hormone produced in the hypothalamus and released from the posterior pituitary. Known as the 'bonding hormone,' it plays roles in childbirth, lactation, social bonding, and emotional regulation. Research explores its effects on stress, anxiety, social cognition, pain modulation, and metabolic function. Binds to oxytocin receptors (OXTR) widely expressed in central and peripheral tissues.
- Vial size: 10 mg
- Reconstitution: 3 mL bacteriostatic water
- Concentration: 3.33 mg/mL
- Administration: subcutaneous
Research areas
- Social Bonding
- Stress Reduction
- Anxiety
- Mood Enhancement
- Pain Modulation
- Metabolic Health
Quick start
- Reconstitute: Add 3.0 mL bacteriostatic water to the 10 mg vial for about 3.33 mg/mL
- Typical dose: 100 mcg daily, titrated up to 500 mcg daily over 12 weeks
- Easy measuring: At 3.33 mg/mL, 1 unit = 0.01 mL = 33.3 mcg on a U-100 syringe; 100 mcg is 3 units and 500 mcg is 15 units
- Storage: Lyophilized at -20°C; refrigerate at 2-8°C after mixing and use within 28-30 days
Dosing protocol
| Phase | Dose | Frequency | Volume |
|---|---|---|---|
| Weeks 1–2 | 100mcg | Once daily | 0.03mL |
| Weeks 3–4 | 200mcg | Once daily | 0.06mL |
| Weeks 5–6 | 300mcg | Once daily | 0.09mL |
| Weeks 7–8 | 400mcg | Once daily | 0.12mL |
| Weeks 9–12 | 500mcg | Once daily | 0.15mL |
How it works
Oxytocin is a nine-amino-acid hormone made in the hypothalamus and released from the posterior pituitary. It binds the oxytocin receptor (OXTR), a G protein-coupled receptor that signals mainly through Gq and calcium release. In the uterus this triggers smooth-muscle contraction, and in the breast it drives milk ejection. In the brain, oxytocin acts on regions such as the amygdala, hypothalamus and reward circuits, where it modulates stress responses, social recognition and pain processing. Synthetic oxytocin (Pitocin and equivalents) is an approved prescription drug, given by intravenous infusion or intramuscular injection to induce or augment labour and to control postpartum bleeding. An intranasal form was formerly approved in some countries to support milk let-down. Uses for anxiety, social cognition, autism, pain or weight are investigational. Human research on intranasal oxytocin has produced mixed results: early small studies suggested improved social cognition and trust, but larger and better-controlled trials, including in autism, have often failed to show consistent benefit. Small trials have explored appetite and weight effects with modest or inconsistent findings. Daily subcutaneous use, as in this protocol, has very little published study, and the peptide has a short half-life of a few minutes in the circulation.
Reconstitution steps
- Draw 3.0mL bacteriostatic water with a sterile syringe
- Inject slowly down the vial wall; avoid foaming
- Gently swirl/roll until dissolved (do not shake)
- Label and refrigerate at 2–8°C, protected from light
- Can aliquot reconstituted solution into sterile vials and freeze at −20°C for extended storage (thaw each aliquot once only)
Storage
Store lyophilized at −20°C (−4°F) for long-term, or refrigerate at 2–8°C for short-term. After reconstitution, refrigerate at 2–8°C; stable up to 28–30 days. Avoid repeated freeze–thaw cycles.
Important notes
- Research use only
- Oxytocin does not significantly cross the blood-brain barrier from subcutaneous administration — peripheral effects predominate
- Intranasal administration is thought to better engage central receptors
- Rapid clearance — effects are acute per dose; consistent timing recommended
- Discard reconstituted solution if it becomes cloudy, discolored, or contains particles
- Rotate injection sites (abdomen, thighs, upper arms) to minimize local irritation
Supplies
- Bacteriostatic water
- Insulin syringes (U-100, 30- or 50-unit preferred)
- Alcohol swabs