Comparison of adverse events in social media already documented elsewhere

Data source compared with social media	Number of studies	Percentage of adverse events from social media already documented in data source*
Pharmacovigilance data	16	84% (n = 1)
Published trials	7	89% (n = 1)
Drug labels	2	57%–58%, 75%–85% (n = 2)
Published trials and drug labels	1	99% (n = 1)
Micromedex	1	70% (n = 1)
Compendium of Pharmaceuticals and Specialties (CPS)	1	NA
MedlinePlus	1	74%-88% (n = 1)

^*not measured in most studies.

n = number of studies, NA = not applicable