Abstract | OBJECTIVE:
Midodrine hydrochloride is a short-acting pressor agent that raises blood pressure in the upright position in patients with orthostatic hypotension. The US Food and Drug Administration's Subpart H approval, under which midodrine was initially approved, requires post-marketing studies to confirm midodrine's clinical benefit in this indication. The purpose of this study was to evaluate the clinical benefit of midodrine with regard to symptom response. METHODS: This was a double-blind, placebo-controlled, randomized, crossover, multicenter study (NCT01518946). Following screening, patients aged ≥18 years with severe symptomatic orthostatic hypotension and on a stable dose of midodrine for at least 3 months were randomized to treatment with either their previous midodrine dose or placebo on day 1 and the respective alternate treatment on day 2. The primary endpoint measured time to syncopal symptoms or near- syncope using a 45-min tilt-table test at 1 h post-dose. RESULTS: Thirty-three patients were screened for inclusion: 19 received at least one dose of midodrine and had at least one post-dose measurement of the primary endpoint. The least-squares mean time to syncopal symptoms or near- syncope after tilt-table initiation (mean ± standard error) was 1626.6 ± 186.8 s for midodrine and 1105.6 ± 186.8 s for placebo (difference, 521.0 s; 95 % confidence interval 124.2-971.7 s; p = 0.0131). There were 15 adverse events in 10 patients; all of these were mild or moderate in severity, with none considered by the investigators to be related to midodrine. INTERPRETATION:
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Authors | William Smith, Hong Wan, David Much, Antoine G Robinson, Patrick Martin |
Journal | Clinical autonomic research : official journal of the Clinical Autonomic Research Society
(Clin Auton Res)
Vol. 26
Issue 4
Pg. 269-77
(08 2016)
ISSN: 1619-1560 [Electronic] Germany |
PMID | 27372462
(Publication Type: Clinical Trial, Phase IV, Journal Article, Multicenter Study, Randomized Controlled Trial, Research Support, Non-U.S. Gov't)
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Chemical References |
- Vasoconstrictor Agents
- Midodrine
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Topics |
- Adolescent
- Adult
- Aged
- Blood Pressure
- Cross-Over Studies
- Double-Blind Method
- Female
- Humans
- Hypotension, Orthostatic
(diagnosis, drug therapy)
- Male
- Middle Aged
- Midodrine
(adverse effects, therapeutic use)
- Supine Position
- Tilt-Table Test
- Treatment Outcome
- Vasoconstrictor Agents
(adverse effects, therapeutic use)
- Young Adult
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