A Double-Blind, Randomized, Three-Arm, Parallel-Group Study to Assess the Efficacy and Safety of Two Doses of Pridopidine Versus Placebo for the Treatment of Levodopa-Induced Dyskinesia in Patients With Parkinson’s Disease (gLIDe)

– Provides signed informed consent form.

– Has clinical diagnosis of Parkinson’s Disease (PD).

– Has Levodopa-induced dyskinesia (LID).

– Patient and/or study partner must demonstrate ability to keep accurate home diary of
PD symptoms.

– Has stable anti-PD treatments for at least 28 days prior to start of study treatment
and kept constant throughout study.

– All routine and allowed prescription/non-prescription medications and/or nutritional
supplements taken regularly must be at stable dosage for at least 28 days prior to
start of study treatment and maintained throughout study.

Exclusion Criteria:

– Diagnosis of atypical Parkinsonism.

– Treatment with dopamine blocking drugs.

– History of surgical intervention related to PD, such as deep brain stimulation.

– History of severe depression, psychosis or hallucinations within 6 months prior to
screening; active suicidal ideation; or suicidal attempt within 5 years prior to
screening.

– History of certain cancers within 5 years prior to screening.

– Significant cardiac event within 12 weeks prior to Baseline or history of certain
cardiac arrhythmias.

– History of epilepsy or seizures within 5 years prior to screening.

– Females who are pregnant or breastfeeding.

– Sexually active female patients who are not surgically sterile or at least 2 years
postmenopausal prior to screening, and who do not agree to utilize a highly effective
hormonal method of contraception in combination with a barrier method, from screening
until at least 4 weeks after completion of study treatment.

– Male patients not using highly effective contraception or not agreeing to continue
highly effective contraception until at least 90 days after the completion of study
treatment.

– Treatment with any investigational product within 30 days of screening or plans to
participate in another clinical study assessing any investigational product during the
study.

Other protocol-defined inclusion/exclusion criteria could apply.