The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries.
From American Pharmacists Association:
Designed only for use by the members of the American Pharmacists Association, the APhA DrugInfoLine app provides summaries of important clinical studies and guidelines published since 2000. New articles are posted weekly, and actions taken by the Food and Drug Administration are posted on an ongoing basis within a few hours after announcement. Clinical literature in all major organ systems is covered, including cardiology, respiratory, gastroenterology, neurology, psychiatry, nephrology, endocrinology, and rheumatology. Infectious diseases and oncology are also covered, as are OTC medicines, alternative medicines, drug interactions, and pharmacogenomics. Special attention is paid to lipids, anticoagulation, asthma, diabetes, HIV infection, and immunizations. Note: The information provided in this app can be viewed in full only by current members of APhA.