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Showing 1–24 of 42 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Phenylephrine hydrochloride infusion Clear all
Withdrawn Not applicable Interventional

Phenylephrine Dose and Mode of Administration for Spinal Anesthesia Induced Hypotension

NCT02101047
View directory record Official record
Conditions
Complications; Cesarean Section, Spinal Anesthetics Causing Adverse Effects in Therapeutic Use
Interventions
Phenylephrine
Drug
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years to 45 Years · Female only
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Nov 7, 2017 · Synced Sep 24, 2026, 10:11 PM EDT
Completed Phase 4 Interventional Results available

Spinal Anesthesia Induced Hypotension During Cesarean Section

NCT00846651
View directory record Official record
Conditions
Hypotension
Interventions
Colloid administration, Crystalloid administration, phenylephrine infusion
Other · Drug
Lead sponsor
Milton S. Hershey Medical Center
Other
Eligibility
18 Years to 35 Years · Female only
Enrollment
82 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
1
States / cities
Hershey, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Oct 15, 2017 · Synced Sep 24, 2026, 10:11 PM EDT
Completed Phase 4 Interventional Results available

Preventing Hypotension in Parturients With an Elevated Body Mass Index (BMI)

NCT01481740
View directory record Official record
Conditions
Hypotension
Interventions
Phenylephrine bolus, phenylephrine infusion
Drug
Lead sponsor
IWK Health Centre
Other
Eligibility
18 Years and older · Female only
Enrollment
178 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Apr 22, 2018 · Synced Sep 24, 2026, 10:11 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Pilot Study On The Role Of Nitric Oxide In Alpha 1-Adrenergic Vasoreactivity

NCT00240058
View directory record Official record
Conditions
Blood Pressure
Interventions
Regional phenylephrine arterial infusion, Nitric Oxide Clamp
Drug
Lead sponsor
Crystal A. Gadegbeku
Other
Eligibility
18 Years to 55 Years
Enrollment
22 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2006
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Jun 4, 2017 · Synced Sep 24, 2026, 10:11 PM EDT
Completed Early Phase 1 Interventional

Effect of Changing Physiological Conditions on Myogenic Oscillations: Pilot Study

NCT03719001
View directory record Official record
Conditions
Vascular Diseases
Interventions
Phenylephrine, Dexmedetomidine, Clevidipine, tetanic stimulus, Increased venous pressure, Calcium Chloride
Drug · Other
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2022
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jun 29, 2022 · Synced Sep 24, 2026, 10:11 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Deciphering Preserved Autonomic Function After Multiple Sclerosis

NCT07012135
View directory record Official record
Conditions
Multiple Sclerosis, Control Subjects, Autonomic Dysreflexia
Interventions
Tests of sympathetic inhibition, Tests of sympathetic activation, Testing of autonomic dysreflexia
Diagnostic Test
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 50 Years
Enrollment
13 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated May 27, 2026 · Synced Sep 24, 2026, 10:11 PM EDT
Suspended Early Phase 1 Interventional

Blood PREssure Augmentation in Large-vessel Occlusion Stroke Study

NCT04218773
View directory record Official record
Conditions
Ischemic Stroke, Blood Pressure
Interventions
Phenylephrine, Norepinephrine
Drug
Lead sponsor
Yale University
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2026
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Sep 3, 2025 · Synced Sep 24, 2026, 10:11 PM EDT
Not listed Phase 4 Interventional Accepts healthy volunteers

Study to Determine the Pharmacokinetics and Pharmacodynamic Effects of Phenylephrine on BP Via IV

NCT02323399
View directory record Official record
Conditions
Hypotension
Interventions
Phenylephrine
Drug
Lead sponsor
West-Ward Pharmaceutical
Industry
Eligibility
12 Years to 16 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2024
U.S. locations
10
States / cities
Wilmington, Delaware • Washington D.C., District of Columbia • Miami, Florida + 7 more
Source: ClinicalTrials.gov public record
Updated Jul 22, 2024 · Synced Sep 24, 2026, 10:11 PM EDT
Terminated No phase listed Observational

Cardiac Output in Heart Failure Patients With Mechanical Pumps

NCT05195931
View directory record Official record
Conditions
Heart Failure, Systolic, Mechanical Circulatory Support, Cardiovascular Hemodynamics
Interventions
preload challenge, afterload challenge, contractility assessment
Diagnostic Test
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 80 Years
Enrollment
7 participants
Timeline
2021 – 2022
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated May 18, 2023 · Synced Sep 24, 2026, 10:11 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Phenylephrine vs. Norepinephrine Infusion After Spinal Anesthesia for Cesarean Delivery

NCT02354833
View directory record Official record
Conditions
Effects of; Anesthesia, in Labor and Delivery
Interventions
Phenylephrine, Norepinephrine
Drug
Lead sponsor
West Virginia University
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
85 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
1
States / cities
Morgantown, West Virginia
Source: ClinicalTrials.gov public record
Updated Jan 3, 2017 · Synced Sep 24, 2026, 10:11 PM EDT
Withdrawn Early Phase 1 Interventional Accepts healthy volunteers

Role of Acetylcholine in Blood Flow Regulation in Healthy Adults: Effects of Age and Exercise Training

NCT03972683
View directory record Official record
Conditions
Vasoconstriction, Vasodilation
Interventions
Handgrip Exercise Training, Acetylcholine, Adenosine Triphosphate, Atropine, Phenylephrine, Sodium Nitroprusside
Other · Drug
Lead sponsor
Colorado State University
Other
Eligibility
18 Years to 85 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Fort Collins, Colorado
Source: ClinicalTrials.gov public record
Updated Aug 1, 2021 · Synced Sep 24, 2026, 10:11 PM EDT
Terminated Phase 1Phase 2 Interventional Results available

Topical Phenylephrine Solution in Preventing Oral Mucosa in Bone Marrow Transplant Patients Receiving Cyclophosphamide and Total Body Radiation Therapy

NCT02434146
View directory record Official record
Conditions
Neoplasm, Oral Mucosa, Transplant-Related Disorder
Interventions
Topical Phenylephrine Solution
Drug
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years and older
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Dec 8, 2019 · Synced Sep 24, 2026, 10:11 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Exercise in Health and Chronic Obstructive Pulmonary Disease

NCT02300064
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease
Interventions
Knee-extensor exercise test, Exercise test with restricting/releasing blood flow, Exercise test with variable oxygen concentration and MRI, Exercise test with oral antioxidant or placebo cocktail
Other
Lead sponsor
University of Utah
Other
Eligibility
18 Years and older
Enrollment
185 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2016
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated May 31, 2016 · Synced Sep 24, 2026, 10:11 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Neonatal Acid-Base Status After C Section With Maternal Tilt vs. Supine

NCT02243423
View directory record Official record
Conditions
Aortocaval Compression, Fetal Acidosis
Interventions
SUPINE, TILT
Procedure
Lead sponsor
Columbia University
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2016
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jan 25, 2016 · Synced Sep 24, 2026, 10:11 PM EDT
Completed Phase 4 Interventional Results available

Oxytocin And Uterotonic Agent Use For Cesarean Delivery

NCT01549223
View directory record Official record
Conditions
Uterine Atony, Hypotension
Interventions
Oxytocin Infusion, Oxytocin Bolus
Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 28, 2017 · Synced Sep 24, 2026, 10:11 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers Results available

Characterization of Sympathetic Nerve Activity in Stress Cardiomyopathy

NCT01048125
View directory record Official record
Conditions
Cardiomyopathy
Interventions
Sympathetic Nerve Activity, Mental Stress Test (Color Word Test), The Modified Oxford Technique for Baroreflex Sensitivity, Cold Pressor Test, Echocardiographic evaluation
Device · Behavioral · Drug + 1 more
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
21 Years to 90 Years
Enrollment
2 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2012
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Nov 22, 2016 · Synced Sep 24, 2026, 10:11 PM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Mechanisms of Vasovagal Syncope

NCT01791816
View directory record Official record
Conditions
Vasovagal Syncope, Postural Tachycardia Syndrome
Interventions
Phenylephrine, L-Ng-monomethyl Arginine (L-NMMA)
Drug
Lead sponsor
New York Medical College
Other
Eligibility
14 Years to 29 Years
Enrollment
90 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2022
U.S. locations
1
States / cities
Hawthorne, New York
Source: ClinicalTrials.gov public record
Updated May 22, 2025 · Synced Sep 24, 2026, 10:11 PM EDT
Completed Not applicable Interventional

Pilot Study of Real-Time Blood Pressure Decision Support During Cesarean Delivery Under Spinal Anesthesia

NCT07534774
View directory record Official record
Conditions
Spinal Hypotension
Interventions
ARX Decision-Support Display
Other
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 15, 2026 · Synced Sep 24, 2026, 10:11 PM EDT
Completed Phase 4 Interventional Results available

No Drop Post-Op Cataract Surgery

NCT03864133
View directory record Official record
Conditions
Cataract
Interventions
Omidria
Drug
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
55 Years to 90 Years
Enrollment
94 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Nov 29, 2023 · Synced Sep 24, 2026, 10:11 PM EDT
Completed Not applicable Interventional

The Development of Tolerance to α1-Adrenoceptor Blockade With Chronic Carvedilol Treatment

NCT00585091
View directory record Official record
Conditions
Heart Failure
Interventions
phenylephrine
Drug
Lead sponsor
University of Utah
Other
Eligibility
18 Years to 85 Years
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2008
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Jun 12, 2012 · Synced Sep 24, 2026, 10:11 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Hyporeactivity and Gulf War Illness

NCT00100412
View directory record Official record
Conditions
Gulf War Syndrome, Chronic Fatigue Syndrome, Post-Traumatic Stress Disorder
Interventions
Graded dobutamine infusions, Graded phenylephrine injections, Psychosocial challenge involving socioevaluative public speaking
Drug · Behavioral
Lead sponsor
US Department of Veterans Affairs
Federal
Eligibility
Not listed
Healthy volunteers
Accepts healthy volunteers
Timeline
1999 – 2002
U.S. locations
1
States / cities
East Orange, New Jersey
Source: ClinicalTrials.gov public record
Updated Jan 20, 2009 · Synced Sep 24, 2026, 10:11 PM EDT
Enrolling by invitation Phase 4 Interventional

The GUARDIAN Trial - Vasopressor Sub-Study

NCT04934748
View directory record Official record
Conditions
Blood Pressure
Interventions
Routine Blood Pressure Management, Tight Blood Pressure Management, Phenylephrine, Norepinephrine
Procedure · Drug
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
45 Years and older
Enrollment
6,254 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2027
U.S. locations
4
States / cities
Omaha, Nebraska • Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Aug 28, 2025 · Synced Sep 24, 2026, 10:11 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Vascular Function and Uterine Fibroids

NCT02123069
View directory record Official record
Conditions
Leiomyoma
Interventions
Brachial artery catheter, Acetylcholine, Nitroprusside, Norepinephrine, Nitroprusside and phenylephrine
Device · Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
25 Years to 50 Years · Female only
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2018
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Mar 1, 2018 · Synced Sep 24, 2026, 10:11 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers Results available

Alpha-Adrenoceptor Vascular Function In Chronic Kidney Disease Focus On The Role Of Endothelial Nitric Oxide

NCT00356265
View directory record Official record
Conditions
Chronic Kidney Disease, Hypertension
Interventions
Procedure: Regional phenylephrine arterial infusion
Drug
Lead sponsor
University of Michigan
Other
Eligibility
18 Years to 55 Years
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2010
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Jan 22, 2018 · Synced Sep 24, 2026, 10:11 PM EDT