ClinicalTrials.gov (CTG) contains data on trials.
CTG staff and CTG record processing assigns each trial MeSH keywords that indicate trial conditions and trial interventions.
Some trials have basic summary results data. CTG results have mandatory components and optional components. Mandatory components include 2 tables: Serious adverse events and Other adverse events.
Example of XML data on a trial is provided here: http://clinicaltrials.gov/ct2/show/NCT00521599?resultsxml=true http://clinicaltrials.gov/ct2/show/NCT00521599 http://clinicaltrials.gov/ct2/show/results/NCT00521599