Hi Chitra.... More than medicine, what your mom needs is good support from you and the family. Dementia is a progressive disorder. Unfortunately there is no definitive treatment for it except multivitamins and others. Make her feel that you care for her. You can take usefull tips from physiatrist and other rehabilitation professionals initially. When you learn to be positive with her over a period of time you will learn how to deal with her and her problems. Hope for the best....