There is no medication that will "cure" depersonalization. This is the most fundamental thing you should understand right now. I'm confident I am 90% recovered from that rigid, intolerant condition. It was NOT hell as many describe it. It was, however, nowhere near pleasant.
You're gonna have to fight this man. And by fight I dont mean to push it aside with your thoughts or forcibly trying to be "aware" of your presence and convince yourself you are just imagining it.
This is one part psychological and one part chemical. In most cases, DP is triggered by severe anxiety, especially those that have had an underlying anxiety disorder unchecked for years.
Deeper than that, and this is a personal opinion, it is rooted in our egotistical and dualistic nature and the tendency for self-deception. All of these things can, eventually, split your mind causing depression, anxiety, fear, insecurity...Over time, your mind and body become so apart form each other that it disassociates.
But do NOT fret!
Exercise, natural supplements, meditation and distraction will eventually susbside your symptoms. In most cases, it is your thoughts that prolong the issue.
Some have had it for years, and Im sorry for them, I had it for three months and I'd be damned if I was gonna have it for years.
You got to reconnect dude. Do things that are fun, laugh, ACCEPT it is here for now. DP CAN be a positive life-changing experience, just dont drag yourself down by listening to others' objectional views. Your mind creates everything and so if you become master of your thoughts, it can regain its balance.