I was recently reading "American Sickness" by Elisabeth Rosenthal. She was talking about how an anti-nausea medication was taken off the market for safety issues because it caused heart issues at 50 times the dose usually taken. After doctors were forced to use Zofran instead, which costs at least 20 times more.
Residents are in a pretty good spot to write things like this. Fresh enough to have their fingers on the pulse. But, just becoming seasoned enough to pick out WTFs.