There is a guide to citing Micromedex monographs at this link: http://www.micromedex.com/about_us/legal/cite/Citing_Micromedex.pdf.
Facts & Comparisons citing information on their FAQ page: http://factsandcomparisons.custhelp.com/app/answers/detail/a_id/515/session/L3RpbWUvMTMxNjgxMTA1OS9zaWQvQXJVZE9RRWs%3D
Lexicomp also explains how to cite various forms of information from its databases:
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