She has sp? psyzophrenia sp? and we are checking out physical causes. If the eeg and mri don't show anything, I don't know what to do. If you reduce meds for the disease she could end up in the hospital or worse. If we don't she will continue as she has to loose memory and awareness. It's a terrible disease. Is is dementia? who knows. Seems no one.
That said, at times the neurologist can come up with the right diagnosis clinically, or maybe it is something autoimmune, and of course that has to be treated also. To give one example, SLE - lupus cerebritis - can present with almost nothing but brain problems. I would say keep pushing for answers and if some test or treatment is not covered appeal it all the way up. A young person with an apparent dementia deserves the best workup they can get.
What makes you connect her memory loss with the medications she takes for schizophrenia? Did a doctor suggest that?