When the computer flags a drug interaction, I click through and follow what it says. But if you asked me to explain why those two drugs shouldn't mix, I couldn't. I lean on the system completely, and it scares me a little that I don't actually understand the thing I'm supposed to be catching.
More people experience this than they realize.
You depend entirely on the system to catch interactions and don't understand them yourself.
If this sounds familiar, the Library can help you find the bigger picture.