My mother is 91 and has been taking metoprolol for about ten years. For the past year she's been hearing a man singing for hours at a time, and she sees people who wear white coats in her bedroom. The music disturbs her and the people frighten her. She refuses to see a psychiatrist (recommended by her PCP last winter) and does not want to discuss the matter with her PCP. The above symptoms are listed as "less common" side effects of metoprolol.