Low Dose Apomorphine and Parkinsonism

November 27, 2018 updated by: John G. Nutt, Oregon Health and Science University

Does Presynaptic Dopamine Receptor Stimulation Transiently Worsen Parkinsonism?

The purpose of this study is to determine if low doses of apomorphine worsen the motor symptoms of Parkinson's disease.

Study Overview

Status

Withdrawn

Conditions

Intervention / Treatment

Detailed Description

The goal of the study is to learn why some people with Parkinson's disease (PD) get worse right after taking PD medication such as carbidopa/levodopa or as the medication is wearing off.

In this study scientists will determine if apomorphine, a drug used to treat symptoms of PD, will worsen the motor symptoms of people with PD when low doses of the drug are given as a continuous subcutaneous infusion. A continuous subcutaneous infusion means the drug is administered continuously through a small needle placed under the skin. Apomorphine, a PD drug that works similar to carbidopa/levodopa, will be used in this study because it is faster-acting and has a more brief effect than carbidopa/levodopa.

After the initial screening, participants will enter a 3-day treatment phase during which they will receive in random order low dose apomorphine, high dose apomorphine, or placebo (inactive substance). All participants will receive the study drug for 2 of the days at 2 different doses (low and high) and a placebo for 1 day. During the 3 days participants will provide blood samples and have their hearts monitored. Parkinsonism will be monitored each day by speed of finger tapping, foot tapping and walking as well as tremor and dyskinesia scores.

Duration of the study for participants is approximately 4 to 5 days including 1-2 outpatient visits and a 3-day inpatient hospital stay.

Study Type

Interventional

Phase

  • Phase 2

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Oregon
      • Portland, Oregon, United States, 97239
        • Department of Neurology, Oregon Health and Science University, Mail Code OP32, 3181 SW Sam Jackson Park Road

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

35 years to 85 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Have idiopathic Parkinson's disease treated with levodopa and experiencing motor fluctuations
  • Response to levodopa had to be documented by a 10 percent increase in finger or foot tapping speed

Exclusion Criteria:

  • Clinically significant cardiovascular, cerebrovascular, hepatic and renal diseases
  • Psychosis
  • Allergy to apomorphine or 5ht3 inhibitors
  • Prolonged qt interval
  • Pregnancy/breast-feeding
  • Hemodynamic instability
  • Severe nausea
  • Alcohol/drug abuse
  • Other unstable medical conditions

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Crossover Assignment
  • Masking: Double

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Effects on parkinsonism measured with finger and foot tapping speed

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Oregon Health and Science University

Collaborators

National Institute of Neurological Disorders and Stroke (NINDS)

Investigators

  • Principal Investigator: John G. Nutt, MD, Professor of Neurology, Oregon Health and Science University
  • Principal Investigator: Steven Gunzler, MD, Fellow and Clinical Instructor in Neurology, Oregon Health and Science University

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

October 1, 2005

Primary Completion (Actual)

May 1, 2007

Study Completion (Actual)

May 1, 2007

Study Registration Dates

First Submitted

May 10, 2007

First Submitted That Met QC Criteria

May 10, 2007

First Posted (Estimate)

May 11, 2007

Study Record Updates

Last Update Posted (Actual)

November 29, 2018

Last Update Submitted That Met QC Criteria

November 27, 2018

Last Verified

November 1, 2018

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • R01NS021062 (U.S. NIH Grant/Contract)
  • M01RR000334 (U.S. NIH Grant/Contract)

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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