rTMS Over the Dorsolateral Prefrontal Cortex for the Treatment of Impulse Control Disorders in Parkinson's Disease

This study is testing repetitive transcranial magnetic stimulation (rTMS) — a non-invasive brain stimulation technique — as a treatment for impulse control disorders in people with Parkinson's disease. Impulse control problems (like compulsive gambling, shopping, or eating) are a known side effect of some Parkinson's medications. **You may be eligible if...** - You have a confirmed diagnosis of Parkinson's disease - You have been diagnosed by a clinician with an impulse control disorder or related behavior (such as punding or dopamine dysregulation syndrome) - You are currently taking dopamine-replacement medication for Parkinson's - Your depression score (BDI) is 14 or lower - Your cognitive score (MoCA) is 20 or higher **You may NOT be eligible if...** - You have a history of seizures or epilepsy - You have had a stroke, brain tumor, or significant brain injury - You have significant depression (BDI score of 14 or higher) or severe cognitive impairment - You are pregnant - You have metal implants in your head (except dental fillings) - You have had TMS treatment within the past year - You use substances or medications that significantly lower the seizure threshold Talk to your doctor to see if this trial is right for you.