Hello. I'm not aware of any medications being developed for depersonalization or how that would even be conceptualized. There are organizations dedicated to depersonalization awareness and research, the most recent of which I'm aware of is Unreal UK. I'm limited to the English speaking world. Depersonalization research is conducted in many different countries but not as often as research for depression, schizophrenia, etc. Some of the research is psychiatric and other is neuropsychological. Psychiatric treatment is focused on rehabilitation, treatment of comorbid disorders, and acceptance. Neuropsychiatrists seem to be fascinated with brain scans and magnetic stimulation devices. In the US there've been several good books about depersonalization.