Clinical Research

Clinical Trials

Gastrointestinal Natural History Study: A Two-Year Prospective Longitudinal Study using Quantitative and Qualitative Assessments to Define the Natural History of Gastrointestinal Symptoms in Patients with Parkinson’s Disease or at Risk for Developing the Motor Symptoms of Parkinson’s Disease

The Parkinson’s Institute and Clinical Center is performing a research study to understand more about the gastrointestinal symptoms that happen with Parkinson’s disease, and how these symptoms may change over time. Many patients with Parkinson’s disease (PD) have problems with gastrointestinal (gut/bowel) function, such as constipation. Although PD is typically diagnosed because of movement problems such as tremors, and slowness, scientists believe the disease also affects other body functions. Some of these effects on other body functions may start happening even before any movement problems are noticed.

The GI Natural History Study includes several groups: People with PD who have problems with their gastrointestinal function; People with PD who do not have problems with gastrointestinal function, and; People without PD who have certain combinations of REM sleep behavior disorder (RBD), and/or an abnormal smell test, and/or a relative with PD, and/or certain genetic mutations.

Status: Active, Not Enrolling

Please contact us to be added to our waiting list at or call (650) 770-0205.

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Parkinson's Institute and Clinical Center
2500 Hospital Drive, Building 10, Suite 1 | Mountain View, CA 94040
(650) 770-0201 main | (650) 770-0204 fax (secure clinic fax)

Federal Tax ID # 94-3061594