The impact of a newly instituted prime vendor (wholesaler) pharmaceutical system at Veterans Affairs (VA) hospitals was studied at 33 VA centers and 32 matched comparison hospitals. Results indicate satisfaction with the new system and illustrate the solutions to some interesting evaluation problems. (SLD)

This pretest/posttest study used two samples of injecting drug users (184 from street outreach and 103 from a methadone program) to assess drug use and human immunodeficiency virus risk practices. The improvement in risk behaviors at posttest suggests that intervention programs were agents of change. (SLD)