mrcpsych-1893

A 42-year-old man presents for follow-up. He was prescribed paroxetine for depression six months ago, but stopped taking it five days ago due to perceived lack of efficacy. He has a history of asthma but no other significant medical history. Over the past two days, he has been experiencing heightened anxiety, sweating, headaches, and a sensation of needles in his head. During the appointment, he appears restless and paces around the room. What is the most likely cause of his symptoms?