RxList http://www.rxlist.com
Searchable cross index of US prescription products providing links to full prescribing information as well as patient education material.
RXmed http://www.rxmed.com
Prescribing information for physicians, patient handouts on over 400 illnesses and health resource links.
Stockley Drug Interactions http://www.vhn.net/
Drug Interactions by Ivan Stockley is the world's most detailed and extensive international reference book on drug interactions. Covering prescription drug interaction it is available on the Virtual Health Network.
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