Deep brain stimulation requires surgery to place a battery-powered device in your chest. Afterward, you'll need to stay on your usual dose of Parkinson's medicine. Your device can't be programmed until the swelling in your brain goes down, which takes 2-4 weeks, and you have the pulse generator.
It also can take several months to get the programming right. Once you do, your symptoms could get better, and you may need less medicine.