You don't give many informations about you so we don't know if you are already skilled in Meditation, dedicated to Satan or not, etc. This prevents many advices to come. We are magicians and we have knowledhe but we cannot solve other's problems at a glance in a few words.
n short, dissociative disorder may come from traumas and drugs won't heal it, they would simply suppress some of the symptoms while doing other spiritual damages.
If you have suffered heavy traumas that brought you to c-PTSD or so, you will need both the guidance of a Demon and/or a good therapist. You need to be guided according to you personal situation, traumatic events, and state of dissociation. This takes time and your efforts. Even the Gods won't cancel your problem in a second because it's your own mind recreating it, and you need to work on yourself.