Balance and gait problems are symptoms of PN, although some
meds will make you woozy and tipsy, so will alcohol.
The gait problems are typical of PN sx which is why one of the first
things the neuro asks you to do is walk away from... and toward him/her,
then to stand on tippy toes and balance on your heels for balance.
Doing these things with eyes closed is another dx tool.
These things are done without any medication, early in the diagnostic procedure.