hi, had my first IVIG session for 5 days 4 weeks ago. gave me a splitting headache and really bad joint pain and muscle aches which are more or less better. still got slight soreness of the head though. i was cheerful despite all this as my generalised MG improved dramatically very quickly. beginning to wear off a bit now but I'm still functioning better. i am seronegative and on methotrexate and 9mg prednisolone. 3 years in still not making much progress hence trial of IVIG,