NCT06915792 · University of California, Los Angeles
PEACE Trial: Postpartum Evaluation of Antihypertensive Cessation and Efficacy
(PEACE)
What this study is about
This randomly assigned controlled trial compares two common medications, labetalol and extended-release nifedipine, to determine which is more effective at managing postpartum high blood pressure. We hypothesize that extended-release nifedipine will better control blood pressure and reduce the need for continued medication beyond six weeks postpartum.
View original scientific description
This randomized controlled trial compares two common medications, labetalol and extended-release nifedipine, to determine which is more effective at managing postpartum high blood pressure. We hypothesize that extended-release nifedipine will better control blood pressure and reduce the need for continued medication beyond six weeks postpartum. The study will enroll 110 postpartum participants, randomly assigning them to one of the two medications, with remote blood pressure monitoring to evaluate treatment effectiveness and inform postpartum hypertension management.
Interventions
DRUG
Labetalol
Labetalol is a beta-blocker commonly used to manage hypertension in pregnancy and postpartum. In this study, oral labetalol will be initiated at 200mg twice or three times daily and adjusted up to 2400 mg/day as needed for blood pressure control.
DRUG
Nifedipine
Nifedipine is a calcium channel blocker commonly used to manage hypertension in pregnancy and postpartum. In this study, oral extended-release nifedipine will be initiated at 30mg once daily and adjusted up to 120mg/day as needed for blood pressure control.
Primary outcome measures
Continuation of antihypertensive medication
Time frame: 6 week postpartum
The proportion of participants who continue to require antihypertensive medication beyond 6 weeks postpartum
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- Age ≥18 years Delivery at study institution at ≥28 weeks gestation Postpartum SBP \> 150 and/or DBP \> 100 OR 2 or more SBP \> 140 and/or DBP \> 90 within a 24-hour period Require initiation of an oral antihypertensive medication during postpartum hospital stay or within 7 days of discharge Treating obstetric team amenable to starting either study medication
Exclusion criteria
- Treated with oral antihypertensive medications prior to delivery Known allergies or contraindications to nifedipine or labetalol History of moderate persistent to severe asthma, chronic obstructive pulmonary disease, heart failure, or greater than first-degree atrioventricular heart block Unable to provide written informed consent in English
Where
- Los Angeles, California
Related conditions & keywords
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Jun 5, 2026 · Source of record for eligibility and locations