I agree with kaliope--I've been diagnosed with DID for about 4 years now, and there really aren't any meds to treat it. I mean, sometimes there are meds that can alleviate some of the symptoms somewhat--antidepressants for depression, benzos for anxiety, certain blood pressure meds for nightmares and anxiety--but there is no med to treat DID as a total package.

DID is based in trauma, so everything I've heard and read and experienced says that dealing with the trauma is the key to improving and healing. It's helpful to have a therapist to work with you on that, but it's not necessary. I don't have a therapist, and I've been getting some help out of working through a book called Coping With Trauma-Related Dissociation. I know there are other self-help books for DID out there too, and there are a lot for working with PTSD/trauma, which overlaps a lot with DID.