Review Question - QID 212432

A 67-year-old man presents to his primary care physician primarily complaining of a tremor. He said that his symptoms began approximately 1 month ago, when his wife noticed his right hand making "abnormal movements" while watching television. His tremor worsens when he is distracted and improves with purposeful action, such as brushing his teeth or combing his hair. He reports to having occasional headaches during times of stress. His wife notices he walks with "poor" posture and he finds himself having trouble staying asleep. He has a past medical history of migraine, generalized anxiety disorder, hypertension, and hyperlipidemia. On physical exam, the patient has a tremor that improves with extension of the arm. On gait testing, the patient has a stooped posture and takes short steps. Which of the following is the most effective treatment for this patient's symptoms?