Hello, My husband is on Diovan, he takes Diovan 2x s a day, 80mg in the morning and 40 mg in the evening. He has been taking this medication for approximately 3 years. His doctor recently up this dosage that is why he is taking it 2x s a day. Her intentions are to help him build up his heart muscle due to CHF. This adjustment to the second dose of Divoan has been for a little over a month. We are seeing slight signs of sluggishness, confusion and becoming more tired. He was running almost 4x s a week prior to this increase. We went so far as to look up side effects and found these to be possible ones. Should we have concern? We will contact his doctor however, we are just reaching out for information.