Here is a list of useful pharmacy and medical resources for the PDA: 

• Tarascon ePharmacopoeia -  is the electronic version of the excellent Pocket Pharmacopoeia, a portable drug reference. The ePharmacopoeia enables you to locate detailed drug information from a database of more than 3,000 brand and generic drugs.
• ePocrates - another excellent electronic portable drug reference.  Over 2,600 drugs and tables, including adult & peds indications and dosing, contraindications/ cautions, adverse reactions, mechanism of action, formularies, black box safety information and pricing.  Allows you to check drug interactions including suggested interventions on as many as 30 drugs at a time.  The strongest point of this drug reference is that you can continuously updated it with an integrated autoupdate feature.  An Infectious Disease database (qID) that is fully cross referenced with ePocrates and Formulary references are also offered for the PDA
• Shots 2003  Childhood Immunization Schedule for Palm OS® Handhelds, Shots 2003 is a quick reference guide to the 2003 Childhood Immunization Schedule.  Details on each vaccine are available by clicking on the vaccine names and includes information on basics, high-risk indications, adverse reactions, contraindications, catch-up, and administration for each vaccine.
• MedMath - a freeware medical calculator with over 30 useful formulas
• Syncplicity - a software utility for the Palm Desktop organizer.  It allows the easy importing of data from any source - a web page, an email, or any text document. Information is simply highlighted and dragged to the Syncplicity window, and the click of just one button puts it right in your Palm.