Monthly IVIG infusion over a two-day period has been effective for me. My symptoms diminish in general for the next several weeks, but begin to emerge again just before the next infusion sequence. There are two problematic side effects after day two of the monthly treatments; I have severe headaches with eye swelling and eye pain, lasting about two days. The neurologist has me take a dose of Tylenol and a Benedryl tablet as premedication before each day’s IVIG infusion. I was told to double the Benedryl premeds and take Benedryl again before bedtime to mitigate these symptoms. I also wear sunglasses in the house on those really bad headache days. By three days after IVIG infusion therapy, the side effects are resolved. My prevaling gMG symptoms are (1) eyelid droop with blurred vision, as the day progresses, and (2) arm weakness with shoulder and neck pain. The neurologist tells me that IVIG does not improve MG, but inhibits its progression. After one year of treatment, that seems to be the case for me.