I used to feel great after an Iron infusion, but lately, since they changed what kind of med I get, I really can't tell the difference! Treatments used to take 1 1/2 hours at most, now they do a faster one that pumps it straight from the syringe and takes 1/2 hour. Trouble is, I'm also on a new Crohn's med, and when I ask it that had something to do with it, I'm practically laughed at. I was doing fine on iron when I was on Humira, but now with Skyrizi, the med just doesn't seem to stay in my system. I did read where Skyrizi can cause lower red blood cells, but no one takes me seriously.
It's not just you--everyone is different, taking other meds, other complications.