Benzodiazepines (IMAGE) Umea University Caption One of the four benzodiazepines included in this study, oxazepam, a short-acting benzodiazepine used legally in Sweden, was detected in all STPs (33/33) in the range from 20 to 200 mg (1,000 inhabitants). Credit Department of Chemistry, Umeå University, Sweden Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.