I was diagnosed in the late 90's with idiopathic peripheral neuropathy. I am on a low dose of opioids for both back pain and pn pain but recently misplaced them for several days. I was surprised that I did not suffer any withdrawal symptoms or pains. I am seeing my neurologist after a long absence and know he will want to retest me. Should I leave off my pain medicine? Do they affect testing? Thanks for any suggestions.