** 1. as he is suffering from BP and diabetes also,make sure they are within normal limits, as high blood sugar and blood pressure also contribute to altered sensorium like state. 2. regarding Dementia, he has to be evaluated for Neurological examination for Tests of Memory . 3. your doctor might ask for relevant lab investigations (Vitamin B12,niacin deficiency,thyroid profile, along with CT-Head for any AD, multi infarct dementia,NPH, or for any malignancy. 4. because there is memory loss, In Ayurveda we treat on the lines of Apasmaar i.e.: . mahakalyan ghrita 12gm before food with hot water (in divided doses) . mansmitra vatkam 1 tab at bed time. . smriti sagar ras 250 mg brahmi vati 250 mg vacha churna 500mg twice a day with honey. 5. Avoid heavy-slimy-incompatibile food,alcohol, excess mental stress/ grief/ sorrow, anger, long night wakings.