Hypertension, Pregnancy Induced | Randomized Controlled Trial of Labetalol Versus Hydralazine for Severe Hypertension in Obstetric Patients.

Hypertension, Pregnancy Induced research study

What is the primary objective of this study?

Who is eligible to participate?

Inclusion Criteria: INCLUSIONS CRITERIA Pregnant or post partum patients with systolic blood pressure ≥160mm of Hg or diastolic BP ≥110 mm Hg, on repeat measurement of blood pressure after 15 minutes of rest, meeting following inclusion criteria will be included. 1. Pregnancy greater than 28 wks(gestational age determined by ultrasound prior to 20 weeks which if unavailable then by uterine size at first prenatal visit or by last menstrual period) with gestational hypertension, severe preeclampsia, chronic hypertension, chronic hypertension with superimposed preeclampsia, eclampsia and unclassified hypertension. 2. Postpartum patients, upto 72 hours after delivery, diagnosed as gestational hypertension, severe preeclampsia, chronic hypertension, chronic hypertension with superimposed preeclampsia, eclampsia and unclassified hypertension. 3. Patients with singleton or multiple pregnancy. 4. Patients of all ages and parity. Exclusion Criteria: 1. Patients with asthma. 2. Patients with cardiac failure and heart block. 3. Patients with pacing device in place or any type of cardiac arrhythmia. -

Which medical condition, disease, disorder, syndrome, illness, or injury is researched?

Hypertension, Pregnancy Induced

Hydralazine Adverse Reaction


Pre-eclampsia Superimposed Pre-existing Hypertension

Study Interventions

Interventions can include giving participants drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available or noninvasive approaches such as surveys, education, and interviews.

Drug:LabetalolGroup A( Labetalol) will be receive intravenous labetalol bolus doses as specified in protocol summary.

Drug:HydralazineGroup B(Hydralazine) will serve as control and will receive active comparator Hydralazine intravenous bolus doses as specified in summary.

Study Arms

Research studies and clinical trials typically have two or more research arms. An arm is a group of people who receive the same treatment in the study.

LabetalolThis group (Group A; Labetalol) receiveD intravenous(IV) labetalol manufactured by Zafa pharmaceutical, 50mg/10 ml ampoule) bolus doses administered over 2 minutes, at 10 minutes interval. Initially dose of 20 mg wAS administered, and if required repeated in increments of 40 mg,80 mg,80 mg,80 mg every 10 minutes till SBP became <160 and DBP <110 mm Hg, upto a maximum cululative dose of 300mg(total 5 bolus doses).During this time pulse and blood pressure were checked every 10 minutes.

HydralazineThis group (Hydralazine;Group B) received intravenous Hydralazine and served control. Bolus doses of 5 mg administered over 2 minutes, at 20 minutes interval. Pulse and blood pressure were checked every 10 minutes interval. If SBP threshold of 160 mm Hg or DBP 110 mm Hg was still reached after 20 minutes, then second bolus was repeated. Similarly if after 20 minutes SBP was still ≥160 or DBP ≥110 mm Hg, then third dose was given. If SBP or DBP thresholds were still exceeded after 20 minutes then similarly 4th and 5th dose of 5 mg were given. Failure to reduce SBP<160 or DBP<110 after consecutive maximum 5 boluses(total 25 mg) was labeled as severe persistent hypertension.

Study Status


Start Date: October 2012

Completed Date: March 2015

Phase: Phase 2

Type: Interventional


Primary Outcome: Efficacy (Reduction in blood pressure below thresholds).

Secondary Outcome: Maternal tachycardia

Study sponsors, principal investigator, and references

Principal Investigator: Saima A Siddiqui, MCPS,FCPS

Lead Sponsor: Dow University of Health Sciences


More information:

Discuss Hypertension