To treat a patient with atropine or to give someone atropine as medicine.
From atropine + -ize (suffix meaning 'to cause to be' or 'to treat with'). This verb form became standard in medical terminology to describe the action of administering the drug.
When a doctor needs to atropinize a patient before surgery, they're actually using the same substance that made assassination by poison a signature method of ancient rulers—modernized into precise medical dosing. The same molecule that can kill can save lives depending on the amount.
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