Thank you for posting your query at DoctorSpring.com.
I have noted your symptoms. Drugs may adversely affect the brain and nerves.
Investigations required to study these effects would be MRI brain and nerve conduction studies.
In addition, there may be an added component of anxiety, which can be reduced with anxiolytic medications such as alprazolam or clonazepam.
I hope it helps. Please feel free to get back if you have any more queries.
Dr. Sudhir Kumar MD (Medicine), DM (Neurology)
Senior Consultant Neurologist