I can tolerate at some level the hell of withdrawal with two exceptions: (1) Persistent withdrawal Akathisia -- a relentless "tickle" seemingly deep in hip and shoulder joints that produces involuntary movements to make it stop, but it never stops, even after withdrawal should be over, say, 21 days for Suboxone. Mirtazapine, Clonazepam, and Ropinirole have no efficacy -- only restarting opioids gives relief.  (2) Chronic Pain (diagnosed as Fibromyalgia), which resurfaces as the opioids decline -- I was prescribed Suboxone off-label to manage pain that failed all other attempts, both conventional and not, over the last 15 years: Lyrica, Cymbalta, Mirtazapine, Hydrocodone, Oxycodone, Tizanidine, Prednisone, Hydroxyzine, Supervised Biofeedback, Acupuncture, Massage Therapy, Cognitive Behavior Therapy, Low-inflammation Diet, Regular Exercise (both Cardio and Resistance), IV Nutrition Therapy with Megadose (50g) Vitamin C, and IV Procaine come to mind.