ClinicalTrials.gov ID: NCT05766813
Ages Eligible: 40 Years to 80 Years
Sexes Eligible: All
Study Phase: Phase 2
Study Completion (Estimated): 2025-10
Principal Investigator: Pinky Agarwal, MD, FAAN
Contact Information:
EvergreenHealth Research Department
425-899-5385
EvergreenResearch@evergreenhealthcare.org
Summary:
This is a multicenter, randomized, double-blind, placebo-controlled, parallel-group, fixed-dose study in patients with a diagnosis of Parkinson's Disease consistent with the UK Parkinson's Disease Society (UKPDS) Brain Bank diagnostic criteria, who are experiencing wearing off symptoms and levodopa-induced dyskinesia.
Eligibility Criteria:
Inclusion Criteria
- Male or female between 40 and 80 years of age, inclusive
- Body mass index of 19.0-40.0 kg/m2;
- Diagnosis of PD that is consistent with the UK Parkinson's Disease Society (UKPDS) Brain Bank diagnostic criteria;
- Hoehn and Yahr Scale stage classification of 2 or 3 when in the ON state;
- Have a clinically meaningful response to levodopa (levodopa + DDCI combination) based on Investigator assessment, and meet the following:
- Have been on a stable and optimal dose of levodopa (levodopa + DDCI combination: minimum dose of levodopa equivalent to 100 mg three times daily) for at least 4 weeks prior to Screening, and are expected to continue the same dose regimen throughout the Double-blind Treatment Period;
- If taking other anti-parkinsonian medications (MAO-B [monoamine oxidase B] inhibitor, COMT [catechol-O-methyltransferase] inhibitor, dopamine agonist) in addition to levodopa, have been on a stable dose for at least 4 weeks prior to Screening and are expected to continue the same dose regimen throughout the Double-blind Treatment Period;
- Have wearing-off symptoms and levodopa-induced dyskinesia as per Investigator judgment; 8. Properly complete and return a self-reported home diary for motor function status (Hauser Diary) during the Screening Period, which confirms 3 consecutive days (ie, 3 consecutive, 24-hour periods), each with at least 2½ hours of OFF time during waking hours.
- Has a caregiver to assist with study participation, if determined by the Investigator to be necessary.
Exclusion Criteria
- Medical history indicating parkinsonism other than idiopathic PD, including but not limited to, progressive supranuclear gaze palsy, multiple system atrophy, drug-induced parkinsonism, essential tremor, primary dystonia;
- Has late-stage PD, severe peak-dose dyskinesia, clinically significant end-dose or biphasic dyskinesia, and/or unpredictable or widely swinging fluctuations in their symptoms as assessed by the Investigator;
- Exhibits clinical signs of dementia as indicated by the Mini-Mental State Examination, 2nd Edition: Standard Version (MMSE-2:SV) score of ≤ 24;
- Use of moderate or strong CYP3A4 inhibitors within 5 half-lives of Baseline or CYP3A4 inducers within 2 weeks of Baseline;
- Daily use of nonsteroidal anti-inflammatory drugs (NSAIDs) or acetylsalicylic acid (ASA);
- Use of MAO-A inhibitors, phosphodiesterase type 5 (PDE5) inhibitors, or alpha blockers including tamsulosin, within 5 half-lives of Baseline;
