I have had 3 infusions now and feel like crap after each one. I feel fine the day of and next day and I’m bedridden on the 2nd or 3rd day after. Chills, aches, fever. Thus last one I’ve had intense headaches that aren’t helped my Advil but also a lot of gut tension gas and diarrhea. It’s worth it in the long run because then my muscles stop aching and I don’t need naps everyday, but the side effects aren’t great!!