The Derwent Drug File provides information from the worldwide pharmaceutical literature on all aspects of drugs, from drug design to post marketing surveillance. Coverage includes articles on drug analysis, biochemistry, chemistry, pharmacology, adverse effects, clinical studies, disease treatment, toxicology, animal studies, mechanism of action, drug interactions and comparisons. The database draws on about 1,150 medical and scientific journals as well as congress and conference proceedings. Features include CAS Registry Numbers, Enzyme Commission Numbers, and the Derwent Drug File Thesaurus. The Subscriber File DRUGU is structure-searchable.