Re: iron infusion side effects
I had an infusion last week. I didn't so much have indigestion as stomach cramps. For me they didn't start until about 36 hours after the infusion, around the same time as a back ache and muscle weakness. Resolved about 24-36 hours after that. The headache on the other hand started immediately and took a few days to get any better.
If you're concerned, I'd call your MD.