My husband had an acute episode of pericarditis about 3 weeks ago. He is home from the hospital and the pericardial effusion is resolved; however, he feels as though every day is the first day of the flu. He has had a cough, night sweats , headache, body ache, fatigue and anorexia . He was on a high dose of ibuprofen for the percardial effusion but that was discharged 2 days ago. His labs came back with elevated BUN, Creatinine, and erythrocyte sedimentation rate . The cardiologist and the internist don t seem to have an explanation for why he feels so bad. It feels like a virus but he s been feeling this way for 3 weeks. He sees an infectious disease specialist tomorrow. Any ideas?