My husband is 74 years old his case history pituitary adenoma,hypertension,hid post ptca,post prostate laser surgery,diabetes,hyponatraemia recurrent episodes in the past. . Drugs taking tab ceruvin a 75 0-1-0,tab flouricart 0.1 mg 1-0-0'.tab sell ken XML 50 1-0-1'tab dia micron mr 30 1-0-1. From last six months he is tired on and off. What may be the reason?