*Health Reference (General): Drug Databases

From the National Library of Medicine, contains FDA labels (package inserts) for 31,550 drugs

Products with therapeutic equivalent evaluations from the US Food and Drug Administration

PDR is now a free online resource.

This searchable database contains information about the following FDA-approved products for human use.
includes most of the drug products approved since 1939. The majority of patient information, labels, approval letters, reviews, and other information are available for drug products approved since 1998.
Prescription brand-name drug products, generic drug products, and many therapeutic biological products
Over-the-counter brand-name and generic drugs