Review Question - QID 216740

A 28-year-old man presents to his primary care physician due to concerns about the effect of stress on his body. He works as a business consultant and frequently has to present at meetings and give formal presentations to his clients, which he finds very stressful. Prior to his promotion to this role last year, he was working for the company from home, which he states was "a piece of cake because I didn't have to talk to anybody." During his most recent business meeting, he experienced a headache, heart palpitations, and sweating, prompting him to leave the room. He enjoys the work but is considering asking the company to move him back to his old position, despite the lower pay, "just to get rid of the stress that people add because I always have to worry what they're thinking." Upon questioning, he reports that he often has similar symptoms when spending time with friends, such as at bars and restaurants. As a result, he has decided to spend more time by himself watching documentaries at home. He endorses drinking about 4 beers per week. On examination, he appears tense. Which of the following is the most likely diagnosis?