I have been on Solaris for 6 Mo.{doing very well}, after 13 years. I had a MS crises and spent one week in the hospital. I take infusions of solaris every 2 weeks an IVIG EVERY 3 weeks, I am 82 years old. It is very expensive but medicare has paid the full amount so far. $28,000 per visit for solaris and $6,000 per visit for IVIG infusion.