London, UK; Brentwood, TN, US; 22 April 2008 - Protherics PLC (“Protherics” or the “Company”), the international biopharmaceutical company focused on critical care and cancer, today announces that its placebo-controlled phase 2b Digoxin Immune Fab (DIF) Efficacy Evaluation in Pre-eclampsia (“DEEP”) study in severe pre-eclampsia has met one of its two primary endpoints. Severe pre-eclampsia is a potentially life threatening complication of pregnancy for which there is no effective treatment other than delivery of the baby. Pre-eclampsia is a leading cause of maternal and infant death throughout the world.