Dan, a 50-year-old man, is experiencing muscle stiffness and shaky hands. In the office, you also note his stooped posture. Tests reveal a deficiency of dopamine, which helps confirm a diagnosis of Parkinson disease. Knowing that there is no cure, Dan is upset and ambivalent about taking medication. How can you help Dan understand his condition and how his medication, levodopa plus carbidopa (Sinemet), will help him?

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