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. 2013 Apr 10;20(5):954–961. doi: 10.1136/amiajnl-2012-001431

Table 2.

Number of unique medications, ICD9 codes, and indication pairs extracted from each resource

Resource Medications (% of total) ICD9 codes (% of total) Indication pairs (% of total)
RxNorm 1726 (56) 999 (33) 8040 (13)
SIDER 2 1554 (50) 1703 (57) 17702 (28)
MedlinePlus 1629 (52) 869 (29) 16581(26)
Wikipedia 2608 (84) 2624 (87) 34911 (55)
Union of all resources 3112 3009 63343

SIDER, Side Effect Resource.