I was terrified, but had my infusion the afternoon of Wednesday 5/14. Had no issues that day. 5/15 woke up with a headache and had some fairly mild flu type symptoms. 5/16 back to normal and today (5/17) I feel great and just went for a hike. I stressed for a long time about it, but am glad I moved forward. I did make sure I was well hydrated beforehand, and stayed well hydrated for the days following. I took tylenol just before the infusion, that night and again the next day. I had requested the slower infusion so it was given over an hour instead of in 15 minutes.