There are drug information experts who seek out and evaluate evidence of PDDI. Among the challenges for this effort: there is no single repository, nor a defined, validated, standard search strategy.

There are many different consumers of biomedical information, with varying immediate needs and role perspectives. Looking at two of these communities, we can see how information seeking behaviors and targeted resources differ. 

The popularity of PubMed allows for the collection of vast amounts of usage data, and for the intelligent use of that data to improve the search experience.