premedication

noun
🔊/ˌpriːˌmedɪˈkeɪʃn/
🔊/ˌpriːˌmedɪˈkeɪʃn/
(also informal pre-med)
[uncountable]
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  1. drugs given to somebody in preparation for an operation or other medical treatment麻醉前用药;(治疗)前驱药