The plasma treatment supposedly only 'lasts' for a couple weeks, according to my neuro. It's used to give the meds a chance to start working.
When I went in to the hospital, I was a real mess. I even scared the staff that I was going to code when I choked trying to take pills the morning before my first treatment.
It was sort of 'wheeled in, skip out' situation. The Dr. started me on high dose of Prednisone, with Mestinon and starting on Imuran. That got me started back into 'real life', and was back at work in 2 weeks.
The only problem was the 90 pound weight gain from the Prednisone in 6 months.
Just my experience, YMMV.