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A volunteer subject with no known significant health problems who participates in research to test a new drug, device or intervention. These volunteers are recruited to serve as controls for patient groups. Healthy volunteers receive the same test, procedure, or drug the patient group receives.

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During the early phases (phases 1 and 2), researchers assess safety, side effects, optimal dosages and risks/benefits. In the later phase (phase 3), researchers study whether the treatment works better than the current standard therapy. They also compare the safety of the new treatment with that of current treatments. Phase 3 trials include large numbers of people to make sure that the result is valid. There are also less common very early (phase 0) and later (phase 4) phases. Phase 0 trials are small trials that help researchers decide if a new agent should be tested in a phase 1 trial. Phase 4 trials look at long-term safety and effectiveness, after a new treatment has been approved and is on the market.

Search Results 11-20 of 48 for Parkinson's disease

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  1. A Study to Establish a Registry of Deep Brain Stimulation with the VERCISE™ System

    Jacksonville, FL

  2. A Phase 3 Study With P2B001 in Subjects With Early Parkinson's

    Scottsdale/Phoenix, AZ

  3. A Study to Evaluate TD-9855 to Treat Symptomatic Neurogenic Orthostatic Hypotension (snOH) in Subjects with Primary Autonomic Failure

    Rochester, MN

  4. Mobilaser Study to Help with People Who are Having Problems with Their Gait

    Jacksonville, FL

  5. A 4-Week Study of the Safety, Efficacy, and Pharmacokinetics of JZP-110 [(R)-2-amino-3-phenylpropylcarbamate Hydrochloride] in Subjects With Parkinson's Disease and Excessive Sleepiness

    Scottsdale/Phoenix, AZ

  6. A Study to Understand the Differences of Walking on a Treadmill and Overground in Patients with Parkinson's Disease

    Rochester, MN

  7. Twelve Month Safety and Efficacy Study of CVT-301 In Parkinson's Disease Patients With OFF Episodes

    Scottsdale/Phoenix, AZ

  8. A Study to Evaluate the Durability of TD-9855 for Treating Symptomatic Neurogenic Orthostatic Hypotension in Subjects with Primary Autonomic Failure

    Rochester, MN

  9. A Clinical Study of NLY01 in Patient's With Early Parkinson's Disease

    Jacksonville, FL

  10. Real-Time Feedback Training to Improve Gait and Posture in People with Parkinson’s Disease

    Scottsdale/Phoenix, AZ

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