Epocrates. i would get the expensive version if you're in internal med/family med/ER. when i was a family med resident, epocrates was the best thing i ever got. at the time, griffith's/griffin's (whatever) 5 min consult wasn't on there so all i had was the drugs and infectious disease. i think it would have been great to have that 5 min consult as well as all those tables all combined in epocrates (i had to get my formulas on a separate palm program). i also didn't have the herbal drugs and i dont think that the multicheck came out til i was almost done with residency (another blessing). now that i'm a derm resident, i still buy epocrates and i still use the multicheck on a regular basis. i don't need to buy the expensive program b/c i have no need for the 5 min consult and formulas and all that stuff...i just need the drugs and the multicheck. it'll be a lifesaver.