Dear Tedily:
I am sorry to hear about your son. I am not sure from what you describe why he should be loosing weight. He takes what medication for his seizure control, 330 mg per day is low for some medications and high for others. I do not understand why they would use protein electrophoresis, unless they are looking for monoclonal antibodies of the IgM class or IgG class. There are many reasons why someone would loose weight. It is of fairly acute onset so it might be behavioral? You might want to check with the residence home for more information concerning his behavior and eating habits. It it is worsening of his PSP, then he might be having difficulty with chewing his food.
Sorry, I am not much help.
Sincerely,
CCF Neuro MD