rTMS as an Intervention for Levodopa-induced Dyskinesia

This study tests whether repetitive transcranial magnetic stimulation (rTMS) — a non-invasive brain stimulation technique using magnetic pulses on the scalp — can reduce involuntary movements (dyskinesia) caused by levodopa, the main medication for Parkinson's disease. These uncontrolled movements can significantly impact quality of life. **You may be eligible if:** - You have a confirmed diagnosis of Parkinson's disease - You experience peak-dose dyskinesia — involuntary movements that happen when your levodopa medication is most active - Your Parkinson's medications have been stable for at least 4 weeks - You have signed informed consent **You may NOT be eligible if:** - You have a psychiatric disorder - You take antipsychotic medications, donepezil, or GABAergic drugs (like pregabalin or gabapentin) - You regularly use benzodiazepines or opioids (more than once a week) - You have epilepsy or conditions that increase seizure risk - You have contraindications to MRI (metal implants, pacemaker) - You are pregnant or of childbearing age without contraception Talk to your doctor to see if this trial is right for you.