Quinapril and Depression
Mr. A, a 90-year-old single white man with a history of peripheral vascular disease and mild congestive heart failure, presented with lessened appetite, insomnia, anhedonia, lessened energy, and suicidal ideation. His symptoms had started a month before when he was started on a regimen of oral quinapril, 10 mg/day, and worsened over the 2 weeks before admission. His other medications, which were not altered during the period, included oral furosemide, 20 mg/day, and oral digoxin, 0.125 mg/day. There was no prior psychiatric history. He did not abuse alcohol or drugs. He had a BUN level of 34 mg/dl, a creatinine level of 1.2 mg/dl, and a digoxin level of 1.2 mg/ml. His thyrotropin level, total iron-binding capacity, B12 and folic acid levels, and VDRL test results were all normal. At admission, a mental status examination revealed a man who was alert, oriented, and cognitively intact. His speech was clear, coherent, and goal directed. His mood was depressed and his affect constricted. He reported anhedonia, lessened energy, middle insomnia, and lessened appetite. He had suicidal ideation without intent or plan. He was without psychotic symptoms.Since the mood change began right after quinapril treatment was begun, the recommendation was made to discontinue it. Mr. A was given diltiazem treatment. He reported improvement in his mood in the first 48 hours. He gradually recovered and, by the fifth day, was back to his baseline symptoms. Following his discharge, he did not feel any anhedonia or discouragement about the future.
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