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• Interactions

Other drugs can interact with oxytocin resulting in dangerous side effects and/or decreased effectiveness. Do not take any other prescription or over-the-counter medicines, including vitamins, minerals, and herbal products, without first talking to your doctor during treatment with oxytocin.

Side effects with oxytocin are not common. Serious side effects include:

• an allergic reaction (shortness of breath; closing of the throat; hives; swelling of the lips, face, or tongue; rash; or fainting);

• difficulty urinating;

• chest pain or irregular heart beat;

• difficulty breathing;

• confusion;

• sudden weight gain or excessive swelling;

• severe headache;

• rash;

• excessive vaginal bleeding; or

• seizures.

Other, less serious side effects may be more likely to occur. Talk to your doctor if you experience

• redness or irritation at the injection site;

• loss of appetite; or

• nausea or vomiting.

Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.