Hi, welcome to HCM, I am Dr Das
Firstly if your wife has hemoglobin
level of 8.5 then it is difficult toimprove just by iron thrapy.
is indicated when hemoglobin level below 10mg/dl. So, just consult the treating doctor for arranging blood transfusion.
Iron therapy has some side effects like abdominal discomfort, discoloration of skin etc.