I just performed my first prescription on eRxNow. It does have a superior medication database. I don't know if Amazingcharts can link with eRxNow. Without a link, it wouldn't be worth the double entry.
It would be nice if Amazingcharts could have a universal memory for each provider so that certain diagnosis is linked with frequently prescribed medication. There's a lot that can be learned from how eRxNow works in helping make Amazingcharts software save time for providers.
