Abstract: Methods, apparatuses, and computer program products are provided for identifying candidates for a clinical study. A method may include determining a study criteria set specifying at least one criterion for qualification for the clinical study. The method may further include accessing electronic prescription transaction information. The method may additionally include identifying one or more prospective candidates for the clinical study at least in part by analyzing the electronic prescription transaction information to determine at least one patient having a prescription history satisfying the study criteria set. Corresponding apparatuses and computer program products are also provided.