You can tell your psychiatrist he is lacking some knowledge about DPDR. With different psychiatrists I tried Zoloft, Seroplex, Prozac, Effexor, Seresta, Risperdal, Solian, Abilify, Olanzapine, Haldol, Lamictal, Naltrexone different combinations as well as Lithium. None of it could solve my problem. You can tell him that it is very harmful to pretend one has simple solutions to complicated problems. Of course medication can help people or maybe solve their problem for good, and I would probably advise people to try in some circumstances. But they should stop pretending they know just to secure some patients or to make them temporarily happy with anticipation. Going to doctor after doctor, each of them telling you that they know bette than the previous one and they have the actual solution is more depressing than he can imagine. There is nothing wrong with telling someone that you have some reasons to believe that this or that could help and you are would like to try it, and if it doesn't work at least you will have more information. There is nothing wrong with that. Nothing wrong with telling people you don't know but you are going to try.
But really, it's terrible to hear people promise they will cure you and the give up because they don't understand and leave you with the feeling of being doomed. They keep making people believe doctors know everything, and then when people realize they don't know about their disease they think they have a rare disease and are doomed. Whereas not knowing for sure is rather the norm, and it doesn't mean anyone is hopeless.