Researchers probe blood pressure Drugs' effect on abdominal veins in rare nerve disorder
NCT ID NCT02897063
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looks at how midodrine and droxidopa, two drugs used for low blood pressure upon standing, affect the veins in the abdomen of people with autonomic failure. About 34 adults aged 40-80 with conditions like multiple system atrophy or Parkinson's disease will participate. The goal is to understand how these medications work, not to test a new treatment.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Phase 1
The first testing in people. Mainly checks safety and dose, usually in a small group.
- Participants
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About 34 people
The number the study aims to enrol. It can still change while the study runs.
- Start date
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Sep 2016
- Expected to finish
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Dec 2026
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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40 to 80 years
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
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Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Male and female subjects, age 40-80 years with possible or probable Multiple System Atrophy, Pure Autonomic Failure, or Parkinson disease, as defined by Consensus Criteria. * Neurogenic orthostatic hypotension defined as a ≥30-mmHg decrease in systolic blood pressure within 3 minutes of standing associated with impaired autonomic reflexes determined by autonomic testing in the absence of other identifiable causes. * Subjects able and willing to provide informed consent. Exclusion Criteria: * Supine hypertension, defined as systolic blood pressure of ≥ 160 mmHg measured on two separate occasions. * Pregnancy. * Systemic illnesses known to produce autonomic neuropathy, including but not limited to diabetes mellitus, amyloidosis, monoclonal gammopathies, and autoimmune neuropathies. * History of known aortic aneurisms, thoracic, abdominal or pelvic surgery in the past 6 months. * Symptomatic abdominal or inguinal hernias. * Severe gastroesophageal reflux. * Recent fractures or fissures of ribs, thoracic or lumbar spine. * Medical devices implanted on the abdominal wall or abdomen that would interfere with the abdominal compression. * Intolerance to any increase in intraabdominal pressure. * Clinically unstable coronary artery disease or major cardiovascular or neurological event in the past 6 months, and other factors which in the investigator's opinion would prevent the subject from completing the protocol including clinically significant abnormalities in clinical, mental or laboratory testing.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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Autonomic Dysfunction Center/ Vanderbilt University Medical Center
RECRUITINGNashville, Tennessee, 37232, United States
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