To Kevin,

Your uncle is not suffering from PAWS after 10 years.  In the worst cases, Post-acute withdrawal lasts only about two years after complete abstinence.  Complete abstinence includes opioid and synthetic opioid pain meds, as well as benzodiazepine tranquilizers, among other drugs.

There are a number of other conditions with similar symptoms, including diabetes. He needs to discuss them with a good internist, and he needs to be totally up front with the doc about his history of drug use and his recovery.