MIDWIFERY MEDICINES, SURGERIES. Uterotonics (Drugs That Stimulate Uterine Contractions) ✅ Definition:Uterotonics are medications that stimulate uterine contractions to induce labour, prevent postpartum hemorrhage (PPH), or aid in incomplete abortions. ✅ Common Uterotonics & Their Uses: Drug Mechanism of Action Indications Dosage & Route Contraindications Oxytocin (Pitocin) Stimulates uterine smooth muscle contraction. Labour induction, PPH prevention. 10 IU IM/IV for PPH, 2 mU/min IV for induction. Previous uterine rupture, fetal distress.