My husband has been treated for Parkinson's for 18 years. Last year during a bad episode, a new neurologist thought it may be MSA rather than Parkinson's. Most doctors have not even heard of MSA. One of the symptoms has to do with low blood pressure. While hospitalized, his blood pressure actually dropped to 40/27. He was rushed to ICU from the mental health facility. Notice I said "mental health". He developed suicide impulses. I believe this was due to the meds he was given. I often think I should ween him off all meds.
Anyway, I don't think anyone knows much about MSA and that is why you have not received a reply.
Good luck and God Bless. Linda