Not just high alert though. Don't forget the caustic meds like:
Phenergan & Toradol - make sure you dilute & push slow or it will burn like fire.
Lasix - if pushed faster than a turtle crawling then you can cause ototoxicity (even though turtles can crawl quite fast but you get the point.)
Vancomycin & Potassium infusions will burn in a hand/wrist IV and if not infused slow enough to be tolerable.
You'll use those a lot on M/S. Also don't forget to have the patients eat some crackers with the pain meds & antibiotics so you're not dealing with anti-nausea medication shortly thereafter. You'll learn these over time. I'm still learning.