main menu   -   articles   -   prostate   -   stories   -   sexuality   -   resources   -   glossary   -   search     From Phoenix5's Prostate Cancer Glossary Phase IV trial Definition: Once a treatment has been approved and is being marketed, it is studied in a phase IV clinical trial to evaluate side effects of the new treatment that were not apparent in the Phases III trial. Thousands of people are involved in a phase IV trial. More information at Food and Drug Administration. See Phase III trial. make another selection #s   A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  WXYZ main menu   -   articles   -   prostate   -   stories   -   sexuality   -   resources   -   glossary   -   search The Glossary Booklet   -   The Personal Edition Definitions are provided for education only and are not medical advice. Created exclusively for Phoenix5. © 2002 Phoenix5.