Help! CIDP & Psoriatic Arthritis/Methotrexate/Humira/Simponi

I was diagnosed with CIDP in April of 2010. Currently receiving 60g of Gamunex twice a month to good effect.

Just saw my rheumatologist who diagnosed me with psoriatic arthritis. He wants to start me on Methotrexate immediately. May also add Humera and/or Simponi if the Methotrexate alone doesn’t do the trick.

Does anyone here have any experience with psoriatic arthritis and/or any of these medications? The side effects look pretty bad, and commencing this therapy is a difficult decision for me. Any advice would be more than welcome.:confused: