Suggest Remedy For Chronic Dizziness

hi i am 45year old physically fit and active i have been experiencing dizzyness for the last 4days and my bp was 91/135 and sugar after breakfast 85 which is very normal i guess. Also upon consulting the doctor i was given dizinil which i have taken 3dozes sofar. I never had this issue in the past. I do not have any other medical conditions and i would appreciate if you could advise as what other tests or doctor i need to visit to get things checked.