It may say that 60% of physicians use this site as a drug interaction checker, but
http://www.epocrates.com/ is a great source for me, as a transcriptionist, to compare drugs and dosages to keep my providers in check to make sure they are dictating the appropriate amounts for the drugs their patients take. I care for who I transcribe for and do not wish their medical records to be inaccurate or compromised if dictated incorrectly. I take pride in protecting my clients.