Overview
DESCRIPTION Each mL of Oxytocin Injection, USP (synthetic), intended for intravenous infusion or intramuscular injection, possesses an oxytocic activity equivalent to 10 USP Oxytocin Units and contains chlorobutanol anhydrous (chloral derivative) 0.5%. This product may contain up to 12.5% decomposition products/impurities.
Mechanism of Action
CLINICAL PHARMACOLOGY Oxytocin injection (synthetic) acts on the smooth muscle of the uterus to stimulate contractions; response depends on the uterine threshold of excitability. It exerts a selective action on the smooth musculature of the uterus, particularly toward the end of pregnancy, during labor and immediately following delivery. Oxytocin stimulates rhythmic contractions of the uterus, increases the frequency of existing contractions and raises the tone of the uterine musculature. Synthetic oxytocin does not possess the cardiovascular effects, such as elevation of blood pressure, as exhibited by vasopressin found in posterior pituitary injection.
Indications
- INDICATIONS AND USAGE IMPORTANT NOTICE: Oxytocin Injection, USP (synthetic) is indicated for the medical rather than the elective induction of labor. Available data and information are inadequate to define the benefits to risks considerations in the use of the drug product for elective induction. Elective induction of labor is defined as the initiation of labor for convenience in an individual with a term pregnancy who is free of medical indications.
Common Doses
- 000 mL
- 1 mL
- 500 mL
Dosage
DOSAGE AND ADMINISTRATION Dosage of oxytocin is determined by uterine response. The following dosage information is based upon the various regimens and indications in general use. Induction or Stimulation of Labor Intravenous infusion (drip method) is the only acceptable method of administration for the induction or stimulation of labor. Accurate control of the rate of infusion flow is essential. An infusion pump or other such device and frequent monitoring of strength of contractions and fetal heart rate are necessary for the safe administration of oxytocin for the induction or stimulation...
Contraindications
- CONTRAINDICATIONS Oxytocin injection (synthetic) is contraindicated in any of the following conditions: • Significant cephalopelvic disproportion; • Unfavorable fetal positions or presentations which are undeliverable without conversion prior to delivery, i.e., transverse lies; • In obstetrical emergencies where the benefit-to-risk ratio for either the fetus or the mother favors surgical intervention; • In cases of fetal distress where delivery is not imminent; • Prolonged use in uterine inertia or severe toxemia; • Hypertonic uterine patterns; • Patients with hypersensitivity to the drug; •...
Side Effects
- ADVERSE REACTIONS To report SUSPECTED ADVERSE REACTIONS, contact Fresenius Kabi USA, LLC at 1-800-551-7176 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. The following adverse reactions have been reported in the mother: • Anaphylactic reaction • Postpartum hemorrhage • Cardiac arrhythmia • Fatal afibrinogenemia • Nausea • Vomiting • Premature ventricular contractions • Pelvic hematoma Excessive dosage or hypersensitivity to the drug may result in uterine hypertonicity, spasm, tetanic contraction or rupture of the uterus.
Interactions
- No major interactions listed on the FDA label. Always consult a healthcare professional.