My Mother vimla dubey age 75 years a type 2 sugar patient.when her sugar level p.p. goes 250 or above her mental problem begins.she confused some time she says some buddy stolen something or she bath many times. these problems are accuers 4 times in last five years. after controlling of sugar level within 3 months she becomes normal but at present her sugar level controlled from January 18 but still here's brain not working properly. So kindly please suggest me some useful medicines. thanks