Skip to content

An Open-Label Tolerability and Exploratory Efficacy Study of Zonisamide for Dyskinesias in Parkinson's Disease

An Open-Label Tolerability and Exploratory Efficacy Study of Zonisamide for Dyskinesias in Parkinson's Disease

Status
Suspended
Phases
Phase 4
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT03034538
Enrollment
20
Registered
2017-01-27
Start date
2016-04-08
Completion date
2022-12-31
Last updated
2021-11-23

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Dyskinesias, Parkinson Disease, Parkinsonism

Brief summary

In this 12-week, open-label pilot study, the investigators will enroll 20 subjects with Parkinson's Disease to determine if two doses of Zonisamide are tolerable and demonstrate clinical benefit for Dyskinesias. The primary outcome measure is tolerability, as determined by number of subjects able to complete the study on their originally assigned dosage. Secondary outcome measures will use the Unified Dyskinesia Rating Scale (UDysRS), comprised of an Objective Section and a Historical Section, to compare baseline to 6 and 12-week measurements. Additional analysis of the effect of Zonisamide on quality of life will be measured by the Parkinson's Disease Quality of Life Questionnaire (PDQ-39).

Interventions

100mg

Sponsors

The Cooper Health System
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Diagnosis of PD * Identified dyskinesias of the limbs or trunk as agreed upon by subject and investigator, with dyskinesias considered moderately to completely disabling (UPDRS question 33, greater or equal to 2) * Able to provide informed consent and swallow capsules * Stable doses of dopaminergic therapy for 2 weeks before and expected throughout the study.

Exclusion criteria

* Atypical parkinsonism * Concurrent use of amantadine or active DBS where patient has some control over settings * Prior surgery for PD * Sulfa allergy or intolerance of zonisamide * Significant concomitant medical illness in the opinion of the Principal Investigator (renal disease, liver disease) * Pregnant subject or a subject who plans to become pregnant

Design outcomes

Primary

MeasureTime frameDescription
Unified Dyskinesia Rating Scale (UDysRS)12 weeksassesses involuntary movements encountered in the treatment of Parkinson's Disease. It consists of a Historical Section, divided into questionnaires about 1) on-dyskinesia and 2) off -dystonia, and an Objective Section, divided into 3) impairment and 4) disability scales. The Historical Section is scored from 0-60, and the Objective section is scored 0-44, where higher scores reflect greater difficulty or impairment.

Secondary

MeasureTime frameDescription
Parkinson's Disease Quality of Life Questionnaire (PDQ-39)12 weeksThe 39-Item Parkinson's Disease Questionnaire (PDQ-39) is a commonly used measure of self-appraisal in PD.

Countries

United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026