This study will determine whether the medication metoclopramide can improve red blood counts in people who have myelodysplastic syndrome (MDS). MDS is thought to affect blood stem cells, which can result in low levels of red blood cells-that is, anemia-as well as low white blood cell and platelet counts. Patients with MDS are at risk for infection, spontaneous bleeding, and possible progression to leukemia, a cancer of bone marrow. Although bone marrow can produce some blood cells, this production can be decreased in patients with MDS. The definitive way to treat MDS is stem cell transplantation, but serious complications and a high risk of death make it unsuitable for patients older than age 60 or those who do not have a matched sibling donor. However, scientists have noted improvement in anemia by using metoclopramide, an inexpensive, commonly used medication that does not have many negative side effects. This study will evaluate the safety and effectiveness of that medicine for patients with MDS.