In a 70-year-old male with fatigue and anemia, what treatment option is most appropriate given his lab findings?

In the context of a 70-year-old male presenting with fatigue and anemia, the most appropriate treatment option among those provided is the oral administration of ferrous sulfate.

Iron deficiency is a common cause of anemia, particularly in older adults, and can lead to symptoms such as fatigue, weakness, and pallor. Ferrous sulfate is a well-established oral iron supplement that helps replenish iron stores in the body and is typically the first line of treatment for iron deficiency anemia. When the anemia is suspected to be due to a lack of iron, initiating treatment with oral ferrous sulfate can lead to a response that includes improved hemoglobin levels and alleviation of fatigue.

Other treatment options, while beneficial in specific contexts, may not be the first line when dealing with suspected iron deficiency anemia. For example, erythropoietin injections are typically used in cases of anemia related to chronic kidney disease or certain types of cancer, rather than straightforward iron deficiency. Cobalamin injections are administered for vitamin B12 deficiency anemia rather than iron deficiency, which is not indicated in this scenario unless there is specific evidence of low vitamin B12 levels. A bone marrow transplant is an invasive procedure reserved for specific conditions such as certain leukemias or severe aplastic anemia, not