How in any sense of the word is it "dismissive" to re-verify history, medications, and allergies?

Who said anything about dismissing or doubting a history or complaint? "So, just to review, your medical history includes X, Y and Z?" or "Says here, you take A, B and C, is this correct?"

That's not dismissive, but important, especially if I'm going to be administering potent cardiac or other medications to you via IV, that could have serious complications.

But hey, you do you, keep grinding that ax.