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PreeclampsiaPhase 3P-PATNCT04298034

Preeclampsia Postpartum Antihypertensive Treatment

A Phase 3 study testing Labetalol, Nifedipine in people with Preeclampsia and Hypertension in Pregnancy, run by Medical College of Wisconsin at 1 site in United States.

Active, not recruiting

Under way, not looking for participants. Everyone needed has enrolled. The study is still running.

Official record
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Trial summary

The goal of this study is to compare whether antihypertensive treatment in the postpartum period decreases postpartum hypertension and its associated maternal morbidity, including risk of readmission and healthcare utilization in comparison with no treatment. Read more about this study

Who is it for?
Ages 18 years and older, women only
Conditions the study is for
Preeclampsia, Hypertension in Pregnancy
What is being tested?
Labetalol, Nifedipine
Could I receive a placebo?
No, everyone receives an active treatment
How many people
300 participants
Where
1 siteUnited States
Study dates
17 Jul 2020to 30 Sep 2026
Phase
Phase 3
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • Women only
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Age >= 18 years old
  • Immediately postpartum (delivered in previous 96 hours)
  • Diagnosed with preeclampsia during pregnancy, labor or immediately postpartum
  • >30% of blood pressures in the postpartum period were elevated (systolic 140 or higher OR diastolic 90 or higher)

Who cannot join

  • Chronic hypertension with superimposed preeclampsia
  • Diagnosis of preeclampsia after discharge from delivery hospitalization
  • Persistent severe range blood pressures after delivery requiring initiation of antihypertensive regimen by the care team
  • >50% of blood pressures in the postpartum period were normal (systolic less than 140 AND diastolic less than 90)

Trial locations and contacts

1 site in 1 country.

United States1 site
  • Medical College of Wisconsin-Froedtert Hospital

    Milwaukee, Wisconsin, 53226

Other trials in United States

About this study

Official title: Randomized Controlled Trial for Postpartum Antihypertensive Treatment of Women With Preeclampsia

The goal of this study is to compare whether antihypertensive treatment in the postpartum period decreases postpartum hypertension and its associated maternal morbidity, including risk of readmission and healthcare utilization in comparison with no treatment. Women with preeclampsia diagnosed during the antepartum, intrapartum or postpartum period will be randomized to either initiate antihypertensive treatment or standard of care. We hypothesize that postpartum antihypertensive treatment of patients with preeclampsia will decrease risk of hospital readmission, healthcare utilization and the number of severe range blood pressures at postpartum follow-up visits.

Read the detailed description

This will be a randomized, controlled trial of 300 women with a diagnosis of preeclampsia at any point in their current pregnancy or immediately postpartum. Immediately postpartum is defined as preeclampsia diagnosed after delivery but prior to discharge from the hospital. The diagnosis of preeclampsia will be made using standardized definitions by the American College of Obstetrics and Gynecology. Preeclampsia is diagnosed with new-onset hypertension of blood pressure of greater than or equal to 140 systolic blood pressure or greater than or equal to 90 diastolic blood pressure recorded twice at least four hours apart AND proteinuria, defined as 300mg of protein in a 24hour urine collection or a protein/creatinine ratio of 0.3. If the above blood pressure criteria are met and there is not proteinuria, preeclampsia can still be diagnosed if there is thrombocytopenia with platelet count of less than 100,000, renal insufficiency with creatinine of greater than 1.1 or twice the patient's individual baseline, impaired liver function with AST or ALT twice normal or epigastric/right upper quadrant pain, pulmonary edema, new-onset headache unresponsive to medication, or visual disturbance. All of these findings should not be explained by an alternative diagnosis.

Women will be consented and randomized at the time of their diagnosis, within 96 hours of their delivery. The patients randomized to the treatment group will have an antihypertensive medication prescribed to them. The specific medication will be either labetalol, nifedipine or hydralazine based on allergies and clinically appropriateness of the medication. The patient will be instructed on the dosing, timing, and possible adverse effects. All subject's blood pressures will be monitored per standard postpartum protocols. As per standard practice, all patients with preeclampsia will be asked to return at 7-10 days for a blood pressure check and then again at 6 weeks for a complete postpartum assessment.

Consent of patients, review of blood pressures, data collection and storage, and statistical analysis will be performed at the Medical College of Wisconsin (MCW) through the Maternal Fetal medicine department. Women will be allowed to continue routine antenatal, intrapartum and postpartum care with their primary obstetrician. The research team will follow enrolled patients through the 6-week postpartum follow up.

Being tested
Labetalol, Nifedipine
Medical subject headings
Pre-Eclampsia, Hypertension, Pregnancy-Induced

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Labetalol, NifedipineDrug

    Also called Procardia, Trandate, Normodyne

    Antihypertensive treatment that is safe and well studied in peripartum women.

Study groups in NCT04298034
Study groupRoleWhat they receive
TreatmentExperimentalThe patients randomized to the treatment group will have an antihypertensive medication prescribed to them. The specific medication will be either labetalol or nifedipine based on allergies and clinically appropriateness of the medication. The patient will be instructed on the dosing, timing, and possible adverse effects.
Receives: Drug: Labetalol, Nifedipine
No-treatmentNo interventionNot described

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Hospital Readmission

    Measured: Within 6 weeks from delivery

Secondary outcomes (4)
  1. Rate of Healthcare Utilization

    hospital readmissions, increased number of postpartum visits or phone calls, emergency room or urgent care visits, consultation with primary care (internal medicine, family medicine), cardiology, or maternal-fetal-medicine specialists

    Measured: Within 6 weeks from delivery

  2. percentage of severe range blood pressures at the 7-10 days postpartum visit

    Measured: 7-10 days postpartum

  3. percentage of severe range blood pressures at the 6 week postpartum visit

    Measured: Approximately 6 weeks postpartum

  4. compare mean systolic and mean diastolic blood pressure values at 7-10 days postpartum and at 6weeks postpartum

    Measured: 6 weeks pospartum

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted6 Mar 2020
  2. Study start17 Jul 2020
  3. Primary completion30 Jun 2025
  4. Study completion30 Sep 2026 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Masking
Single blind
Who is masked
Outcomes assessor
Enrolment
300 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT04298034
Sponsor's protocol ID
PRO36760
Acronym
P-PAT
Status last verified
Oct 2025
First submitted
4 Mar 2020
Last updated
20 Jul 2026
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
No

Publications

  • Sibai BM. Hypertensive disorders of pregnancy: the United States perspective. Curr Opin Obstet Gynecol. 2008 Apr;20(2):102-6. doi: 10.1097/GCO.0b013e3282f73380. No abstract available.

    PubMed 18388806
  • Mogos MF, Salemi JL, Spooner KK, McFarlin BL, Salihu HH. Hypertensive disorders of pregnancy and postpartum readmission in the United States: national surveillance of the revolving door. J Hypertens. 2018 Mar;36(3):608-618. doi: 10.1097/HJH.0000000000001594.

    PubMed 29045342
  • Tan LK, de Swiet M. The management of postpartum hypertension. BJOG. 2002 Jul;109(7):733-6. doi: 10.1111/j.1471-0528.2002.01012.x. No abstract available.

    PubMed 12135206
  • Ade-Conde JA, Alabi O, Higgins S, Visvalingam G. Maternal post natal hospital readmission-trends and association with mode of delivery. Ir Med J. 2011 Jan;104(1):17-20.

    PubMed 21387880
  • Clapp MA, Little SE, Zheng J, Robinson JN. A multi-state analysis of postpartum readmissions in the United States. Am J Obstet Gynecol. 2016 Jul;215(1):113.e1-113.e10. doi: 10.1016/j.ajog.2016.01.174.

    PubMed 27829570
  • Ferrazzani S, De Carolis S, Pomini F, Testa AC, Mastromarino C, Caruso A. The duration of hypertension in the puerperium of preeclamptic women: relationship with renal impairment and week of delivery. Am J Obstet Gynecol. 1994 Aug;171(2):506-12. doi: 10.1016/0002-9378(94)90290-9.

    PubMed 8059832
  • Kassebaum NJ, Bertozzi-Villa A, Coggeshall MS, Shackelford KA, Steiner C, Heuton KR, Gonzalez-Medina D, Barber R, Huynh C, Dicker D, Templin T, Wolock TM, Ozgoren AA, Abd-Allah F, Abera SF, Abubakar I, Achoki T, Adelekan A, Ademi Z, Adou AK, Adsuar JC, Agardh EE, Akena D, Alasfoor D, Alemu ZA, Alfonso-Cristancho R, Alhabib S, Ali R, Al Kahbouri MJ, Alla F, Allen PJ, AlMazroa MA, Alsharif U, Alvarez E, Alvis-Guzman N, Amankwaa AA, Amare AT, Amini H, Ammar W, Antonio CA, Anwari P, Arnlov J, Arsenijevic VS, Artaman A, Asad MM, Asghar RJ, Assadi R, Atkins LS, Badawi A, Balakrishnan K, Basu A, Basu S, Beardsley J, Bedi N, Bekele T, Bell ML, Bernabe E, Beyene TJ, Bhutta Z, Bin Abdulhak A, Blore JD, Basara BB, Bose D, Breitborde N, Cardenas R, Castaneda-Orjuela CA, Castro RE, Catala-Lopez F, Cavlin A, Chang JC, Che X, Christophi CA, Chugh SS, Cirillo M, Colquhoun SM, Cooper LT, Cooper C, da Costa Leite I, Dandona L, Dandona R, Davis A, Dayama A, Degenhardt L, De Leo D, del Pozo-Cruz B, Deribe K, Dessalegn M, deVeber GA, Dharmaratne SD, Dilmen U, Ding EL, Dorrington RE, Driscoll TR, Ermakov SP, Esteghamati A, Faraon EJ, Farzadfar F, Felicio MM, Fereshtehnejad SM, de Lima GM, Forouzanfar MH, Franca EB, Gaffikin L, Gambashidze K, Gankpe FG, Garcia AC, Geleijnse JM, Gibney KB, Giroud M, Glaser EL, Goginashvili K, Gona P, Gonzalez-Castell D, Goto A, Gouda HN, Gugnani HC, Gupta R, Gupta R, Hafezi-Nejad N, Hamadeh RR, Hammami M, Hankey GJ, Harb HL, Havmoeller R, Hay SI, Pi IB, Hoek HW, Hosgood HD, Hoy DG, Husseini A, Idrisov BT, Innos K, Inoue M, Jacobsen KH, Jahangir E, Jee SH, Jensen PN, Jha V, Jiang G, Jonas JB, Juel K, Kabagambe EK, Kan H, Karam NE, Karch A, Karema CK, Kaul A, Kawakami N, Kazanjan K, Kazi DS, Kemp AH, Kengne AP, Kereselidze M, Khader YS, Khalifa SE, Khan EA, Khang YH, Knibbs L, Kokubo Y, Kosen S, Defo BK, Kulkarni C, Kulkarni VS, Kumar GA, Kumar K, Kumar RB, Kwan G, Lai T, Lalloo R, Lam H, Lansingh VC, Larsson A, Lee JT, Leigh J, Leinsalu M, Leung R, Li X, Li Y, Li Y, Liang J, Liang X, Lim SS, Lin HH, Lipshultz SE, Liu S, Liu Y, Lloyd BK, London SJ, Lotufo PA, Ma J, Ma S, Machado VM, Mainoo NK, Majdan M, Mapoma CC, Marcenes W, Marzan MB, Mason-Jones AJ, Mehndiratta MM, Mejia-Rodriguez F, Memish ZA, Mendoza W, Miller TR, Mills EJ, Mokdad AH, Mola GL, Monasta L, de la Cruz Monis J, Hernandez JC, Moore AR, Moradi-Lakeh M, Mori R, Mueller UO, Mukaigawara M, Naheed A, Naidoo KS, Nand D, Nangia V, Nash D, Nejjari C, Nelson RG, Neupane SP, Newton CR, Ng M, Nieuwenhuijsen MJ, Nisar MI, Nolte S, Norheim OF, Nyakarahuka L, Oh IH, Ohkubo T, Olusanya BO, Omer SB, Opio JN, Orisakwe OE, Pandian JD, Papachristou C, Park JH, Caicedo AJ, Patten SB, Paul VK, Pavlin BI, Pearce N, Pereira DM, Pesudovs K, Petzold M, Poenaru D, Polanczyk GV, Polinder S, Pope D, Pourmalek F, Qato D, Quistberg DA, Rafay A, Rahimi K, Rahimi-Movaghar V, ur Rahman S, Raju M, Rana SM, Refaat A, Ronfani L, Roy N, Pimienta TG, Sahraian MA, Salomon JA, Sampson U, Santos IS, Sawhney M, Sayinzoga F, Schneider IJ, Schumacher A, Schwebel DC, Seedat S, Sepanlou SG, Servan-Mori EE, Shakh-Nazarova M, Sheikhbahaei S, Shibuya K, Shin HH, Shiue I, Sigfusdottir ID, Silberberg DH, Silva AP, Singh JA, Skirbekk V, Sliwa K, Soshnikov SS, Sposato LA, Sreeramareddy CT, Stroumpoulis K, Sturua L, Sykes BL, Tabb KM, Talongwa RT, Tan F, Teixeira CM, Tenkorang EY, Terkawi AS, Thorne-Lyman AL, Tirschwell DL, Towbin JA, Tran BX, Tsilimbaris M, Uchendu US, Ukwaja KN, Undurraga EA, Uzun SB, Vallely AJ, van Gool CH, Vasankari TJ, Vavilala MS, Venketasubramanian N, Villalpando S, Violante FS, Vlassov VV, Vos T, Waller S, Wang H, Wang L, Wang X, Wang Y, Weichenthal S, Weiderpass E, Weintraub RG, Westerman R, Wilkinson JD, Woldeyohannes SM, Wong JQ, Wordofa MA, Xu G, Yang YC, Yano Y, Yentur GK, Yip P, Yonemoto N, Yoon SJ, Younis MZ, Yu C, Jin KY, El Sayed Zaki M, Zhao Y, Zheng Y, Zhou M, Zhu J, Zou XN, Lopez AD, Naghavi M, Murray CJ, Lozano R. Global, regional, and national levels and causes of maternal mortality during 1990-2013: a systematic analysis for the Global Burden of Disease Study 2013. Lancet. 2014 Sep 13;384(9947):980-1004. doi: 10.1016/S0140-6736(14)60696-6. Epub 2014 May 2.

    PubMed 24797575
  • ACOG Practice Bulletin No. 202: Gestational Hypertension and Preeclampsia. Obstet Gynecol. 2019 Jan;133(1):1. doi: 10.1097/AOG.0000000000003018.

    PubMed 30575675
  • Levine LD, Nkonde-Price C, Limaye M, Srinivas SK. Factors associated with postpartum follow-up and persistent hypertension among women with severe preeclampsia. J Perinatol. 2016 Dec;36(12):1079-1082. doi: 10.1038/jp.2016.137. Epub 2016 Sep 1.

    PubMed 27583396
  • American College of Obstetricians and Gynecologists' Committee on Practice Bulletins-Obstetrics. ACOG Practice Bulletin No. 203: Chronic Hypertension in Pregnancy. Obstet Gynecol. 2019 Jan;133(1):e26-e50. doi: 10.1097/AOG.0000000000003020.

    PubMed 30575676
  • Boffa RJ, Constanti M, Floyd CN, Wierzbicki AS; Guideline Committee. Hypertension in adults: summary of updated NICE guidance. BMJ. 2019 Oct 21;367:l5310. doi: 10.1136/bmj.l5310. No abstract available.

    PubMed 31636059

Questions about this trial

What is this clinical trial studying?

A Phase 3 study testing Labetalol, Nifedipine in people with Preeclampsia and Hypertension in Pregnancy, run by Medical College of Wisconsin at 1 site in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 4 inclusion and 4 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: under way, not looking for participants, as of the sponsor's last update on 20 Jul 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 3 studies compare the treatment with the current standard treatment or a placebo in a large group, to confirm how well it works and watch for side effects.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Hospital Readmission (time frame: Within 6 weeks from delivery). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT04298034, which also lists 11 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 20 Jul 2026.

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