Im borderline with pressure problems, I am on a mild drug to control it.
When I get my home infusions, my blood pressure usually shoots up quite a bit.
I dont have any severe reactions like you.
I had one allergic reaction, and that was because the rate of infusion was way too fast.
Im quite sure they are monitoring your rate, because a faster rate is usually a big problem for most people.
I hope you tolerate it better in the future.