I hope this helps you. I just got my medical records, blood work out etc. To see what my levels were when I had the infusion.
Ferritin- (L) 5.9 ng/mL (Normal range shows 23.0 - 336.0)
Iron- (L) 22.0 mcg/dL (Normal range shows 28.0 - 170.0)
Iron Saturation (L) 3% (Normal range shows 20-50)
TIBC (H) 553mcg/mL (Normal range shows 255-450)
My B12 level was 98. I now get the shot every 3 weeks. So after the infusion and getting the shot every 3 weeks my levels have stayed somewhat in the normal range. You should ask for copies of all your blood work to see what level you are and if you feel it's very low get a 2nd opinion and see if someone else will give you an infusion sooner. It's not nasty like the pills and once you get one shouldn't need another one for awhile!
1000mg Sulfasalazine 3x Daily
50000IU Vitamin D Once a Week
Zofran ODT As Needed
100MCG/ML INJ, 1ML Cyanocobalamin B12 Every 3 Weeks