I found this on the Parkinson drug list so I assume that some people
with Parkinson take Benzodiazepines....

It's allso good to be carefull of abrupt withdrawel as it could cause hyperacusis disorder..
I know a person who came down with tinnitus and hyperacusis after withdrawing
from benzo.. It can happen...

Benzodiazepine withdrawal also can be more intense if the benzodiazepine involved possesses a relatively short duration of action such as alprazolam. Abdominal cramps, confusion, depression, perceptual disturbances, sweating, nausea, vomiting, parasthesias, photophobia, hyperacusis, tachycardia, and trembling also occur during benzodiazepine withdrawal, but the incidence of these reactions is lower. Convulsions, hallucinations, delirium, and paranoia also can occur. Benzodiazepines should be withdrawn cautiously and slowly, using a very gradual dosage-tapering schedule..

http://www.parkinsons-information-exchange-network-online.com/drugdb/004.html