Have you tried Epocrates Rx on your Google Android or Palm webOS smartphone? The software is currently beta and you won't get any updates, but it's stable and it runs well. You can view photos of pills, check for drug-drug interactions, and use important tables and calculators.
I know that many physicians rely on Epocrates on a daily basis. Are you one of those users? I still remember when Epocrates launched its company in 1998 and when PDAs were starting to enter the medical industry. Those were simple days of grayscale Palm Pilots and AAA batteries. Now, we have a wide selection of powerful devices like the Motorola Droid and the Palm Pre.