Intravenous Levodopa for the Diagnosis of Parkinson's Disease

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. Identifier: NCT00001928
Recruitment Status : Completed
First Posted : December 10, 2002
Last Update Posted : March 4, 2008
Information provided by:
National Institutes of Health Clinical Center (CC)

Brief Summary:

Patients with Parkinson's disease have low levels of the neurotransmitter dopamine. Dopamine is responsible for motor function and normal physical activity. Patients with Parkinson's disease typically suffer from tremors, rigid muscles, stooped postures, and walk with a shuffle. The drug levodopa acts as a replacement for dopamine and has been has been used effectively for over 30 years as treatment for Parkinsons disease. Because of its effectiveness, levodopa has been used to distinguish Parkinson's disease from other conditions that may resemble Parkinson's disease.

Traditionally, levodopa has been given as a pill. In this study, researchers would like to inject levodopa directly into a vein (intravenous) in order to diagnose cases of Parkinson's disease. This method provides immediate results and allows doctors to adjust the dose of levodopa very carefully. Because the intravenous method of giving levodopa is less practical than oral medication, it is not an available alternative for the routine treatment of Parkinson's disease. However, it may be useful for faster diagnosis of the disease and for determining effective doses of oral medication.

Condition or disease
Parkinson Disease

Detailed Description:
A positive response to levodopa is now considered a condition sine qua non for the diagnosis of idiopathic Parkinson's disease. Under this protocol, patients with parkinsonism of uncertain etiology will be tested for their motor response to intravenous levodopa to aid in the diagnosis of Parkinson's disease. This protocol regulates and stipulates the acute administration of intravenous levodopa and associated safety issues.

Study Type : Observational
Enrollment : 25 participants
Official Title: Intravenous Levodopa in Parkinsonism
Study Start Date : March 1999
Study Completion Date : July 2000

Resource links provided by the National Library of Medicine

Drug Information available for: Levodopa

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.

Ages Eligible for Study:   Child, Adult, Older Adult
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

All patients will have parkinsonism of undetermined etiology.

Males and females between the ages of 18 and 85 are eligible for the study.

No presence or history of any medical condition that can reasonably be expected to subject the patient to unwarranted risks, specifically those who have the following: a history of convulsive, hepatic, or renal disorders; currently receiving treatment for myocardial infarction, arrhythmia or cardiac failure; and pregnant women or anyone not practicing an effective means of birth control.

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 identifier (NCT number): NCT00001928

United States, Maryland
National Institute of Neurological Disorders and Stroke (NINDS)
Bethesda, Maryland, United States, 20892
Sponsors and Collaborators
National Institute of Neurological Disorders and Stroke (NINDS)

Publications: Identifier: NCT00001928     History of Changes
Other Study ID Numbers: 990072
First Posted: December 10, 2002    Key Record Dates
Last Update Posted: March 4, 2008
Last Verified: March 1999

Keywords provided by National Institutes of Health Clinical Center (CC):

Additional relevant MeSH terms:
Parkinson Disease
Parkinsonian Disorders
Basal Ganglia Diseases
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Movement Disorders
Neurodegenerative Diseases
Antiparkinson Agents
Anti-Dyskinesia Agents
Dopamine Agents
Neurotransmitter Agents
Molecular Mechanisms of Pharmacological Action
Physiological Effects of Drugs