Dear client . Kindly tell diary for what condition your grandfather was seen by the neurologist. Was it stroke was it seizure or was it dementia. It is my humble request to kindly not depend upon non standard medical reqourv to take healthcare related decisions. My Impression is that your grandfather must have been suffering from either stroke or vascular dementia. These conditions are outcome of abnormal clotting proceeds in blood vessels. In order to prevent further formation of blood clots in important blood vessels and to take care of vascular risk factors like  dyslipidemia and hypercoagulable states the neurologist must have prescribed theses meds. Kindly let me know the diagnosis and symptoms of your grandfather as early as possible.