I do not know if dissociation is the same as the opiate release part of ptsd. The opiates we make in our bodies and release when we go numb are addictive. Some people overtrain or become "rage-a-holics" to get their fix. If you've ever gotten really mad or scared, then gone to a peaceful calm numb place, then felt touchy or irritable or weepy or suicidal or wanted to drink a lot of coffee or cut or work out till you puke or you just feel "impossible" for a long time...that's opiate. I don't know if its actually physically addictive. t could be. A lot of people are psychologically dependent without knowing it. I used to overtrain and drink pots of coffee and chain smoke. I smoked a pack of Winstons a day at my most athletic. Talk about dissociation.