Cerezyme (Imiglucerase) is used to treat certain rare genetic problems (such as Gaucher disease). Imiglucerase replaces a certain natural substance (an enzyme called glucocerebrosidase) that is missing in people with Gaucher disease. This medicine helps to improve blood, bone, liver and spleen problems caused by Gaucher disease. Imiglucerase does not correct the genetic problem and must be continued for life.