My father is 68yrs old. He is complaining vertigo. Brain scan does not show any visible errors. One neurologist suspects it is Parkinson and gave medicene as below PARKITIDIN -2 PER DAY ROPARK 0.25 -3 PER DAY RASALT -1 MG - 1 PER DAY QPEN 50- 1 PER DAY AMLIP-5 -2 PER DAY CLOPIKORT -1 using fro last 1 month and no use. no improvement in vertigo part. His memory is good . conversation , hearing , vision is good. he is a smoker. please advise