Parkinson's Disease Treatment With Coenzyme Q10

This study has been completed.
Information provided by:
National Institute of Neurological Disorders and Stroke (NINDS) Identifier:
First received: February 25, 2000
Last updated: June 23, 2005
Last verified: December 2003

The purpose of this study is to compare the effects of varying dosage of coenzyme Q10 (CoQ10) versus a placebo in the treatment of Parkinson's disease (PD) in patients with early, untreated PD.

Condition Intervention Phase
Parkinson's Disease
Drug: Coenzyme Q10
Phase 2

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double-Blind
Primary Purpose: Treatment
Official Title: Effects of Coenzyme Q10 in Early Parkinson's Disease

Resource links provided by NLM:

Further study details as provided by National Institute of Neurological Disorders and Stroke (NINDS):

Study Start Date: September 1998
Estimated Study Completion Date: October 2003
Detailed Description:

Four groups of 20 subjects/group of subjects will be randomly assigned to receive CoQ10 (at doses of 300, 600 or 1200 mg/day) or matching placebo. A subject must have early PD that does not require treatment. A subject will be evaluated at a Screening Visit, a Baseline Visit (after which the subject begins to take the study drug) and visits at 1, 4, 8, 12, and 16 months after the baseline visit. The subject will be followed until she/he needs treatment with levodopa or for a maximum of 16 months. Because CoQ10 is a component of the mitochondria (the part of a cell that makes energy), blood samples will be taken at the baseline visit and the last visit to study mitochondrial function.


Ages Eligible for Study:   30 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • The subjects must have the three cardinal features of PD: slowness of movement, resting tremor and rigidity. The signs of PD must be greater on one side.

Exclusion Criteria:

  • Disorders that mimic PD.
  • Other serious medical problems.
  Contacts and Locations
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, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00004731

United States, New York
University of Rochester
Rochester, New York, United States, 14620
Sponsors and Collaborators
Principal Investigator: Clifford W. Shults, M.D. University of California, San Diego
  More Information

No publications provided Identifier: NCT00004731     History of Changes
Other Study ID Numbers: R01NS36714
Study First Received: February 25, 2000
Last Updated: June 23, 2005
Health Authority: United States: Federal Government

Keywords provided by National Institute of Neurological Disorders and Stroke (NINDS):
Parkinson's disease
coenzyme Q10

Additional relevant MeSH terms:
Parkinson Disease
Basal Ganglia Diseases
Brain Diseases
Central Nervous System Diseases
Movement Disorders
Nervous System Diseases
Neurodegenerative Diseases
Parkinsonian Disorders
Coenzyme Q10
Growth Substances
Pharmacologic Actions
Physiological Effects of Drugs
Vitamins processed this record on October 22, 2014