I found out i have crohn's january third of 2013 also have pyoderma ganrenosum &anemia how can i keep my iron up with all 3 at times i get weak.

IV iron: First please confirm that it is indeed iron deficiency anemia.

IV Iron: Ask your doctor about getting IV iron replacement (feraheme) instead of oral replacement.

Multiple deficiencys: In addition to iron you may have zinc calcium b12, a, c, folate (folic acid) and protein deficiencies. For anemia 50-75 mg of feosol or other of the gentler irn preparations may be all you can add at a time but you may not tolerate any in which case you might need iron infusions, dietary protein to the degree tolerated vit c supplement 1mg b12/ day or B12 shot may be easiest work with your gastroenterologist.