Safety and Efficacy Study of SYN115 in Parkinson's Patients Using Levodopa to Treat End of Dose Wearing Off

This study has been completed.
Information provided by (Responsible Party):
UCB, Inc. Identifier:
First received: January 24, 2011
Last updated: January 21, 2014
Last verified: January 2014

The purpose of this research study is to test the effect of SYN115 compared to placebo (a "sugar pill" that looks like SYN115 but does not include active drug) on movement during the "on" and "off" states as well as other symptoms that some patients with Parkinson's disease experience. This study will also look at whether or not patients with Parkinson's disease experience "side-effects" with SYN115.

Condition Intervention Phase
Parkinson's Disease
Drug: Tozadenant (SYN115)
Phase 2
Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Parallel Assignment
Masking: Double Blind (Subject, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: A Double-blind, Randomized, Placebo-controlled Study of the Safety and Efficacy of SYN115 as Adjunctive Therapy in Levodopa-treated Parkinson's Subjects With End of Dose Wearing Off

Resource links provided by NLM:

Further study details as provided by UCB, Inc.:

Primary Outcome Measures:
  • Assess efficacy of different doses of SYN115 for reducing the mean total hours of awake time per day spent in the off state [ Time Frame: 12 weeks ] [ Designated as safety issue: No ]

Secondary Outcome Measures:
  • To assess the effect of SYN115 on dyskinesia [ Time Frame: 12 weeks ] [ Designated as safety issue: No ]
  • To assess the effect of SYN115 on UPDRS scores [ Time Frame: 12 weeks ] [ Designated as safety issue: No ]
  • To assess investigator and patient impressions of PD severity and change [ Time Frame: 12 weeks ] [ Designated as safety issue: No ]
  • To assess the effect of SYN115 on non motor symptoms of PD [ Time Frame: 12 weeks ] [ Designated as safety issue: No ]
  • To assess the safety and tolerability of SYN115 [ Time Frame: 12 weeks ] [ Designated as safety issue: Yes ]
  • To assess the effects of SYN115 on daytime drowsiness, impulsive behavior, development of melanoma and suicidal ideation [ Time Frame: 12 weeks ] [ Designated as safety issue: Yes ]

Enrollment: 420
Study Start Date: March 2011
Primary Completion Date: October 2012 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Tozadenant (SYN115) 60mg BID Drug: Tozadenant (SYN115)
Experimental: Tozadenant (SYN115) 120mg BID Drug: Tozadenant (SYN115)
Experimental: Tozadenant (SYN115) 180mg BID Drug: Tozadenant (SYN115)
Experimental: Tozadenant (SYN115) 240 mg BID Drug: Tozadenant (SYN115)
Placebo Comparator: Sugar Pill Drug: Tozadenant (SYN115)


Ages Eligible for Study:   30 Years to 80 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Meet Parkinson's Disease (PD) diagnosis consistent with UK PD diagnostic criteria
  • Meet Hoehn and Yahr PD stage
  • Good response to levodopa
  • Stable regimen of anti-parkinson medications
  • Are able to complete a Parkinson's disease diary
  • If of childbearing potential(male and female), use an acceptable method of birth control
  • Able and willing to sign an IRB/IEC approved informed consent
  • Able and willing to understand study requirements, follow study instructions, attend all visits and undergo all planned tests.

Exclusion Criteria:

  • Secondary or atypical Parkinson's
  • Neurosurgical intervention for Parkinson's disease
  • Treatment with apomorphine
  • Treatment with anti-psychotic drugs
  • Other abnormal findings on physical or neuro exam or history that in the opinion of the investigator would make subject unsuitable for the study or prejudice safety and efficacy evaluation
  • MMSE less than 26
  • Subjects with untreated or uncontrolled current episode of major depression
  • Receipt of any anti-psychotic drugs greater than 1 month in the past 5 years or any exposure in past year (except for quetiapine at doses <100mg per day)
  • Women pregnant or lactating
  • History of hepatitis, cholangitis
  • Untreated or uncontrolled hypothyroidism or hyperthyroidism
  • Drops in blood pressure requiring medication to maintain blood pressure
  • Any clinically significant out of range laboratory evaluations
  • Known sensitivity to the study medication or its components
  • Suicide ideation or type 4 or type 5 on the Columbia suicide severity rating scale
  • Finding of malignant melanoma on full body skin exam
  • Impulse disorder conditions
  Contacts and Locations
Please refer to this study by its identifier: NCT01283594

  Show 62 Study Locations
Sponsors and Collaborators
UCB, Inc.
Study Chair: Steve Bandak, MD Biotie Therapies Inc.
Study Director: Ann Neale, RN Biotie Therapies Inc.
  More Information

No publications provided

Responsible Party: UCB, Inc. Identifier: NCT01283594     History of Changes
Other Study ID Numbers: SYN115-CL02
Study First Received: January 24, 2011
Last Updated: January 21, 2014
Health Authority: United States: Food and Drug Administration

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
Central Nervous System Agents
Therapeutic Uses
Pharmacologic Actions
Dopamine Agents
Neurotransmitter Agents
Molecular Mechanisms of Pharmacological Action
Physiological Effects of Drugs processed this record on April 23, 2014