A Multi-center, Double-blind, Randomized, Parallel-Group, Placebo-Controlled Study to Assess the Clinical Effect of Droxidopa in the Treatment of Symptomatic Neurogenic Orthostatic Hypotension in Patients With Parkinson's Disease
试验速览
- 阶段
- 3 期
- 状态
- 已完成
- 发起方
- 入组人数
- 225
- 试验地点
- 60
- 主要终点
- 306A Efficacy: Change in Orthostatic Hypotension Questionnaire Score (OHQ)
研究概览
简要总结
This is a study to evaluate the effects of an investigational drug, Droxidopa, in participants with neurogenic orthostatic hypotension (NOH), associated with Parkinson's disease. Droxidopa is being studied to determine the effects on blood pressure changes upon standing up (orthostatic challenge). Symptoms and activity measurements, including patient reported falls, will be evaluated to determine the effectiveness of the study drug.
Symptoms of NOH may include any of the following:
- Dizziness, light-headedness, feeling faint or feeling like you may blackout
- Problems with vision (blurring, seeing spots, tunnel vision, etc.)
- Weakness
- Fatigue
- Trouble concentrating
- Head & neck discomfort (the coat hanger syndrome)
- Difficulty standing for a short time or a long time
- Trouble walking for a short time or a long time
The study duration is a maximum of approximately 14 weeks including up to 2 weeks for screening, up to 2 weeks for proper dose finding, followed by an 8 week treatment period and a follow-up visit after 2 weeks. A sufficient number of patients will be screened to allow approximately 211 randomized patients. An extension study is also available to continue treatment if determined appropriate by the study doctor. This Study is NCT01132326 sponsored by Chelsea Therapeutics and is enrolling by invitation only.
详细描述
Systolic blood pressure is transiently and minimally decreased in healthy individuals upon standing. Normal physiologic feedback mechanisms work through neurally-mediated pathways to maintain the standing blood pressure, and thus maintain adequate cerebral perfusion. The compensatory mechanisms that regulate blood pressure upon standing are dysfunctional in subjects with orthostatic hypotension (OH), a condition that may lead to inadequate cerebral perfusion with accompanying symptoms of syncope, dizziness or lightheadedness, unsteadiness and blurred or impaired vision, among other symptoms.
Orthostatic hypotension may be a severely disabling condition which can seriously interfere with the quality of life of afflicted subjects. Currently available therapeutic options provide some symptomatic relief in a subset of subjects, but are relatively ineffective and are often accompanied by severe side effects that limit their usefulness. Support garments (tight-fitting leotard) may prove useful in some subjects, but is difficult to don without family or nursing assistance, especially for older subjects. Midodrine, fludrocortisone, methylphenidate, ephedrine, indomethacin and dihydroergotamine are among some of the pharmacological interventions that have been used to treat orthostatic hypotension, although only midodrine is specifically approved for this indication. The limitations of these currently available therapeutic options, and the incapacitating nature and often progressive downhill course of disease, point to the need for an improved therapeutic alternative.
Symptomatic OH in patients with Parkinson's disease is thought to be a consequence of norepinephrine depletion leading to low systolic blood pressure (SBP) and cerebral-hypoperfusion (reduced blood flow to the brain). Therapy with droxidopa results in increased levels of norepinephrine which should lead to improved SBP and cerebral perfusion thereby reducing the signs and symptoms of NOH. The present study will evaluate the clinical benefit in NOH patients with PD treated with droxidopa compared to those treated with placebo.
Participation in the study will last a maximum of 14 weeks consisting of a 2 week (maximum) screening/baseline period; a 2 week (maximum) double-blind dose titration; an 8 week double-blind placebo-controlled treatment period; and a 2 week follow-up period. An extension study is also available to continue treatment if determined appropriate by the study doctor. This Study is NCT01132326 sponsored by Chelsea Therapeutics and is enrolling by invitation only.
Droxidopa:
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Treatment
- 盲法
- Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- 未提供
排除标准
- •Score of 23 or lower on the mini-mental state examination (MMSE)
- •Concomitant use of vasoconstricting agents for the purpose of increasing blood pressure;
- •Patients taking vasoconstricting agents such as ephedrine, dihydroergotamine, or midodrine must stop taking these drugs at least 2 days or 5 half-lives (whichever is longer) prior to their baseline visit (Visit 2) and throughout the duration of the study
- •Concomitant use of anti-hypertensive medication for the treatment of essential hypertension
- •Have changed dose, frequency or type of prescribed medication, within two weeks of baseline visit (Visit 2) with the following exceptions:
- •Vasoconstricting agents such a ephedrine, dihydroergotamine, or midodrine
- •Short courses (less than 2 weeks) of medications or treatments that do not interfere with, or exacerbate the patient's condition under study (e.g. antibiotics)
- •Known or suspected alcohol or substance abuse within the past 12 months (DSM-IV definition of alcohol or substance abuse)
- •Women who are pregnant or breastfeeding
- •Women of child bearing potential (WOCP) who are not using at least one method of contraception with their partner
- •Male patients who are sexually active with a woman of child bearing potential (WOCP) and not using at least one method of contraception
- •Untreated closed angle glaucoma, or treated closed angle glaucoma that, in the opinion of an ophthalmologist, might result in an increased risk to the patient
- •Sustained severe hypertension (BP ≥ 180 mmHg systolic or ≥ 110 mmHg diastolic in the seated or supine position which is observed in 3 consecutive measurements over an hour)
- •Any significant uncontrolled cardiac arrhythmia
- •History of myocardial infarction, within the past 2 years
- •Current unstable angina
- •Congestive heart failure (NYHA Class 3 or 4)
- •Diabetic autonomic neuropathy
- •History of cancer within the past 2 years other than a successfully treated, non-metastatic cutaneous squamous cell or basal cell carcinoma or cervical cancer in situ
- •Gastrointestinal condition, which in the Investigator's judgment, may affect the absorption of study drug (e.g. ulcerative colitis, gastric bypass)
- •Any major surgical procedure within 30 days of the baseline visit (Visit 2)
- •Previously treated with droxidopa
- •Currently receiving any investigational drug or have received an investigational drug within 30 days of the baseline visit (Visit 2)
- •Any condition or laboratory test result, which in the Investigator's judgment, might result in an increased risk to the patient, or would affect their participation in the study. Additionally the Investigator has the ability to exclude a patient if for any reason they feel the subject is not a good candidate for the study or will not be able to follow study procedures.
研究组 & 干预措施
Droxidopa
droxidopa active drug
干预措施: Droxidopa (Drug)
Placebo
Placebo matched control
干预措施: Placebo (Other)
结局指标
主要结局
306A Efficacy: Change in Orthostatic Hypotension Questionnaire Score (OHQ)
时间窗: Baseline, Week 8
The primary efficacy endpoint for 306A is the relative mean change in Orthostatic Hypotension Questionnaire (OHQ) composite score from baseline to end of study. The OHQ is the average of two sub-scales, the Orthostatic Hypotension Symptom Assessment Scale (OHSA) and the Orthostatic Hypotension Daily Activities Scale (OHDAS). Each asks the patient to rate their symptoms or disease impact over the past week. The OHSA sub-scale is the average of six items: 1) Dizziness, lightheadedness, feeling faint or feeling like you might black out; 2) Problems with vision; 3) Weakness; 4) Fatigue; 5) Trouble concentrating; and 6) Head/neck discomfort. The OHDAS sub-scale is the average of four items: 1) Standing for a short time; 2) Standing for a long time; 3) Walking for a short time; and 4) Walking for a long time. Each item is scored on a Likert scale from 0 to 10, with 10 being the most severe. For the change from baseline, negative numbers represent improvement from baseline in OHQ score.
306B Efficacy: Change in Dizziness/Lightheadedness/Feeling Faint/Feeling Like You Might Black Out (OHSA Item 1)
时间窗: Baseline, Week1
OHSA item 1 scale range: 0 (none) -10 (worst), likert scale. Change: score at Week 1 minus score at baseline. A negative score indicates an improvement in symptoms during the double-blind randomized phase relative to value at baseline.
次要结局
- 306B Efficacy: Change in OHSA Item 1 From Baseline to Week 2 (Visit 5)(Baseline, Week2)
- 306B Efficacy: Change in OHSA Item 1 From Baseline to Week 4 (Visit 6)(Baseline, Week4)
- 306B Efficacy: Change in Systolic Blood Pressure (SBP) Measurements Post Standing From Baseline to Week 1(Baseline, Week 1)
- 306B Efficacy: Change in OHSA Item 1 From Baseline to Week 8 (Visit 7)(Baseline, Week 8)
- 306B Efficacy: Rate of Patient Reported Falls(up to 10 weeks)
- 306B Efficacy: Change in Orthostatic Hypotension Questionnaire Score (OHQ)(Baseline, Week 8)