Hello, Hemoglobin of 9.8 g% for elderly 91 year old is good. Yes, it is anemic and she does require supplements. She is already on Iron supplements by her doctor, as he must have detected iron deficiency anemia. Importantly it is to be noted that hemoglobin percentage to improve after start of treatment would take around a month in the young and in adult, it might take a bit longer. Other supplements include Vit B12 & Folic acid. It is very important to identify if they are deficient before starting treatment as too many unnecessary drugs prescribed in the elderly, she might drop off the essential drugs, like for example hypertension. Get a peripheral smear done in the laboratory and look at the diagnosis. If it is macrocytic anemia, get a vit B12 or folic acid assay. If its deficient you can start treatment. If it is microcytic anemia, you can continue the present treatment. Check for Reticulocyte count in the laboratory after 15-20 days of treatment to look for increase. More then 4% would indicate improvement in anemia condition. However, anemia could not be only cause for her tiredness and weakness. Have her take a nutritious diet regularly. Hope I have answered your query. If you have any other queries, happy to help.