EQUIGEN is composed of two sister, bioequivalency trials. The EQUIGEN Chronic Dose trial is comparing two disparate generics of lamotrigine. The trial is being conducted at 6 sites, with each enrolling approximately 6 subjects each over 12 months. The EQUIGEN Single Dose trial is comparing brand lamotrigine with two disparate generics of lamotrigine. The trial is being conducted at 5 sites, with each enrolling approximately 11 subjects each over 12 months. The University of Cincinnati has contracted with the Johns Hopkins Brain Injury Outcomes team to serve as the Coordinating Center and the Kansas University Medical Center to serve as the Data Management Center for both trials.