I would do anything to avoid an injection. I guess I'm out of the loop as I thought an Iron infusion is an IV affair. At any rate, I avoid such thing as they leave me with a huge bruise. No thanks, if I can avoid it.
Regular iron plugs me right up. Not a desirable result.
My Doc recommends Slow-FE. Slow-FE is a time released iron, so gentle on the stomach and bowels, no constipation issues. In spite of the fact that Slow-FE is time released, it works well enough to keep my iron up.
Good luck,
Tek