We're building a better ClinicalTrials.gov. Check it out and tell us what you think!
Try the New Site
We're building a modernized ClinicalTrials.gov! Visit Beta.ClinicalTrials.gov to try the new functionality.
ClinicalTrials.gov Menu

Phase 3 Clinical Effect Durability of TD-9855 for Treating Symptomatic nOH in Subjects With Primary Autonomic Failure (REDWOOD)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
ClinicalTrials.gov Identifier: NCT03829657
Recruitment Status : Terminated (Stopped early due to company decision. Company decision based on analysis results in TD-9855-0169.)
First Posted : February 4, 2019
Results First Posted : January 20, 2023
Last Update Posted : January 20, 2023
Information provided by (Responsible Party):
Theravance Biopharma

Brief Summary:
A Phase 3, 22-week, Multi-center, Randomized Withdrawal Study of ampreloxetine in Treating Symptomatic Neurogenic Orthostatic Hypotension in Subjects with Primary Autonomic Failure

Condition or disease Intervention/treatment Phase
Symptomatic Neurogenic Orthostatic Hypotension MSA Parkinson's Disease (PD) Pure Autonomic Failure (PAF) Drug: ampreloxetine Drug: Placebo Phase 3

Detailed Description:
Phase 3, multi-center, randomized withdrawal study to evaluate the sustained benefit in efficacy and safety of ampreloxetine in subjects with primary autonomic failures (MSA, PD, or PAF) and symptomatic nOH. The study consists of 3 periods: (i) 16-week open-label (OL) treatment with ampreloxetine, (ii) 6-week randomized placebo-controlled treatment, and (iii) 2-week follow-up (only for patients who do not enroll in Study 0171 (long-term extension safety study)).

Layout table for study information
Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 203 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Intervention Model Description: Open Label Extension followed by Randomized Parallel Assignment
Masking: Triple (Participant, Care Provider, Investigator)
Primary Purpose: Treatment
Official Title: A Phase 3, 22-week, Multi-center, Randomized Withdrawal Study of TD-9855 in Treating Symptomatic Neurogenic Orthostatic Hypotension in Subjects With Primary Autonomic Failure
Actual Study Start Date : February 22, 2019
Actual Primary Completion Date : November 10, 2021
Actual Study Completion Date : November 10, 2021

Arm Intervention/treatment
Experimental: ampreloxetine (Open Label (OL))
Participants will receive ampreloxetine as a single, oral, daily dose of active drug for 16 weeks.
Drug: ampreloxetine
Oral tablet, QD (Daily)
Other Name: TD-9855

Experimental: ampreloxetine
After completing the OL, participants randomized to ampreloxetine will receive single, oral, daily dose of active drug for a further 6 weeks.
Drug: ampreloxetine
Oral tablet, QD (Daily)
Other Name: TD-9855

Placebo Comparator: Placebo
After completing the OL, participants randomized to Placebo will receive single, oral, daily dose of placebo for 6 weeks.
Drug: Placebo
Oral tablet, QD

Primary Outcome Measures :
  1. Proportion of Participants With Treatment Failure at Week 6 of RW Treatment Period [ Time Frame: 6-week randomized withdrawal period (Week 16 to Week 22) ]

    Treatment failure was defined as proportion of participants who met the following criteria at Week 6 following randomization: Change (worsening) from baseline in Question 1 of the Orthostatic Hypotension Symptom Assessment (OHSA#1) score of 1.0 point and worsening of disease severity as assessed by a 1-point change in Patient Global Impression of Severity (PGI-S). OHSA Question #1 assessed dizziness, lightheadedness, feeling faint, or feeling like you might blackout. PGI-S assessed patient's impression of disease severity.

    Least squares mean here is the model-based proportion of participants with treatment failure using logistic regression.

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Layout table for eligibility information
Ages Eligible for Study:   30 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria (For 0169 Completers Group):

  • Subject has completed 4 weeks of double blind treatment in Study 0169 (V6) and, in the opinion of the Investigator, could benefit from continued treatment with ampreloxetine. Only subjects with OHSA#1 score of ≤7 will be eligible for randomization for the double-blind treatment period.
  • Subject has a minimum of 80% study medication compliance in Study 0169.

Inclusion Criteria (For De Novo Group):

  • Subject is male or female and at least 30 years old.
  • Subject must meet the diagnostic criteria of symptomatic nOH, as demonstrated by a sustained reduction in BP of ≥20 mm Hg (systolic) or ≥10 mm Hg (diastolic) within 3 min of being tilted-up ≥60o from a supine position as determined by a tilt-table test.
  • Subject must score at least a 4 on the OHSA#1 at V1.
  • For subjects with PD only: Subject has a diagnosis of PD according to the United Kingdom Parkinson's Disease Society (UKPDS) Brain Bank Criteria (1992).
  • For subjects with MSA only: Subject has a diagnosis of possible or probable MSA of the Parkinsonian subtype (MSA-P) or cerebellar subtype (MSA-C) according to The Gilman Criteria (2008).
  • For subjects with PAF only: Subject has documented impaired autonomic reflexes, including the Valsalva maneuver performed within 24 months from the date of randomization
  • Subject has plasma Norepinephrine (NE) levels ≥ 100 pg/mL after being in seated position for 30 minutes.

Exclusion Criteria (For 0169 Completers Group):

  • Subject has a medical, laboratory, or surgical issue(s) deemed by the investigator to be clinically significant.
  • Subject has an uncooperative attitude or reasonable likelihood of non-compliance with the protocol.
  • Subject has a concurrent disease or condition that, in the opinion of the investigator, would confound or interfere with study participation or evaluation of safety, tolerability, or pharmacokinetics of the study drug.

Exclusion Criteria (For De Novo Group):

  • Subject has a known systemic illness known to produce autonomic neuropathy, including but not limited to amyloidosis, and autoimmune neuropathies.
  • Subject has a known intolerance to other NRIs or serotonin norepinephrine reuptake inhibitors (SNRIs).
  • Subject currently uses concomitant antihypertensive medication for the treatment of essential hypertension unrelated to autonomic dysfunction.
  • Subject has used strong CYP1A2 inhibitors or inducers within 7 days or 5 half-lives, whichever is longer, prior to V1 or requires concomitant use until the follow-up visit.
  • Subject has changed dose, frequency, or type of prescribed medication for orthostatic hypotension within 7 days prior to V1.

    • Midodrine and droxidopa (if applicable) must be tapered off at least 7 days prior to V1.
  • Subject has known or suspected alcohol or substance abuse within the past 12 months (Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, Text Revision [DSM-IV-TR®] definition of alcohol or substance abuse).
  • Subject has a clinically unstable coronary artery disease, or has had a major cardiovascular or neurological event in the past 6 months.
  • Subject has used any monoamine oxidase inhibitor (MAO-I) within 14 days prior to V1.
  • Subject has a history of untreated closed angle glaucoma, or treated closed angle glaucoma that, in the opinion of an ophthalmologist, might result in an increased risk to the subject.
  • Subject has any significant uncontrolled cardiac arrhythmia.
  • Subject has a Montreal Cognitive Assessment (MoCA) ≤23.
  • Subject is unable or unwilling to complete all protocol specified procedures including questionnaires.
  • Subject had a myocardial infarction in the past 6 months or has current unstable angina.
  • Subject has known congestive heart failure (New York Heart Association [NYHA] Class 3 or 4).
  • Subject has a clinically significant abnormal laboratory finding (e.g., alanine aminotransferase [ALT] or aspartate aminotransferase [AST] >3.0 x upper limit of normal [ULN]; blood bilirubin [total] >1.5 x ULN; estimated glomerular filtration rate (eGFR) <30 mL/min/1.73 m2, or any abnormal laboratory value that could interfere with safety of the subject).
  • Subject has demonstrated a history of lifetime suicidal ideation and/or suicidal behavior, as outlined by the Columbia Suicide Severity Rating Scale (C-SSRS)(Baseline/Screening Version). Subject should be assessed by the rater for risk of suicide and the subject's appropriateness for inclusion in the study.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT03829657

Show Show 82 study locations
Sponsors and Collaborators
Theravance Biopharma
Layout table for investigator information
Study Director: Medical Monitor Theravance Biopharma
  Study Documents (Full-Text)

Documents provided by Theravance Biopharma:
Study Protocol  [PDF] August 5, 2020
Statistical Analysis Plan  [PDF] December 14, 2021

Layout table for additonal information
Responsible Party: Theravance Biopharma
ClinicalTrials.gov Identifier: NCT03829657    
Other Study ID Numbers: 0170
2018-003941-41 ( EudraCT Number )
First Posted: February 4, 2019    Key Record Dates
Results First Posted: January 20, 2023
Last Update Posted: January 20, 2023
Last Verified: December 2022
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No
Plan Description: Theravance Biopharma, Inc. will not be sharing individual de-identified participant data or other relevant study documents.

Layout table for additional information
Studies a U.S. FDA-regulated Drug Product: Yes
Studies a U.S. FDA-regulated Device Product: No
Keywords provided by Theravance Biopharma:
Symptomatic Neurogenic Orthostatic Hypotension
symptomatic nOH
multiple symptom atrophy
Parkinson's disease
pure autonomic failure
orthostatic hypotension
low blood pressure
blacking out
Neurogenic Orthostatic Hypotension
Additional relevant MeSH terms:
Layout table for MeSH terms
Parkinson Disease
Hypotension, Orthostatic
Pure Autonomic Failure
Parkinsonian Disorders
Basal Ganglia Diseases
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Movement Disorders
Neurodegenerative Diseases
Vascular Diseases
Cardiovascular Diseases
Orthostatic Intolerance
Primary Dysautonomias
Autonomic Nervous System Diseases