Meperidine Versus Drotaverine Regarding the Effect on the Duration of the First Stage of Labor in Full Term Primigravidae

Inclusion Criteria: ● primigravida. * Singleton pregnancy. * Term gestation i.e, 38-41 weeks. * Sure, reliable dates documented by ultrasound in the 1st half of pregnancy. * Vertex presentation with occipito anterior position. * Efficient uterine contractions at a rate of at least 3 to 4 contractions every 10 minutes, each contraction lasting for at least 40 seconds. Exclusion Criteria: ● Abnormal presentation or occipito posterior position. * Multiple pregnancies. * Cephalo-pelvic disproportion. * Cervical surgery in the past or history of cervical injury. * Patients on antihypertensive therapy. * Known hypersensitivity to drotaverine or meperidine. * If any other spasmolytic agent had been used within 48 hours.