1. The movie "Numb" is amazing and those suffering from DP will more than likely relate, but also get a lot of answers too. It IS what the director/writers life has been like - he's suffered from DP.
2. There's a book the movie shows in one scene and the director talks about in his commentary called "Feeling Unreal: Depersonalization Disorder and the Loss of the Self " by Simeon and Abugel that has gotten rave reviews.
Please look into these two references and I believe you will find some peace.
What I've deduced from these sources is that people suffering from the disorder have a predisposition to it and the symptoms are triggered by stressors. Period. No meds have been found that work for everyone, no therapy techniques can cure it, but effective stress management should put an end to or at least decrease the severity of the symptoms associated with Depersonalizaion disorder.
I hope this helps
