BOXED WARNING Potent oxytocic — use only with strict adherence to recommended dosages; administer by medically trained personnel in a hospital with immediate intensive care and acute surgical facilities
FDA dosing
Population
Start
Target
Max
Abortion (label indications 1–4)
Adults
250 mcg (1 mL) deep IM; optional 100 mcg (0.4 mL) test dose initially
250 mcg IM q1.5–3.5h by uterine response; may increase to 500 mcg (2 mL) if contractility inadequate after several 250 mcg doses
Total ≤12 mg; continuous administration >2 days not recommended
Refractory postpartum uterine bleeding
Adults
250 mcg deep IM ×1 (73% responded to a single injection)
May repeat at 15–90 min intervals per clinical course
Total ≤2 mg (8 doses)
Renal Active renal disease: contraindicated
Hepatic Active hepatic disease: contraindicated
Instructions
Deep IM injection (tuberculin syringe)
Pretreat/concurrently give antiemetics and antidiarrheals to reduce very high incidence of GI effects
Inspect visually for particulate matter and discoloration before administration
Contraindications
Acute pelvic inflammatory disease
Active cardiac, pulmonary, renal, or hepatic disease
Cautions
Use only recommended doses; hospital setting with intensive care and surgical facilities (boxed)
Transient temperature elevation; distinguish from endometritis
May cause transient bronchoconstriction
May augment other oxytocics — concomitant use not recommended
Adverse reactions
Vomiting and diarrhea (~2/3 of patients), nausea (~1/3)
Temperature increase >2°F (~1/8), flushing (~1/14)
Pregnancy Oxytocic used to evacuate the uterus; animal studies not teratogenic but embryotoxic in rats and rabbits — any dose that increases uterine tone puts the embryo/fetus at risk