名詞 contraindication:

1. (medicine) a reason that makes it inadvisable to prescribe a particular drug or employ a particular procedure or treatment

con.tra.in.di.ca.tion

n.（名詞）
A factor that renders the administration of a drug or the carrying out of a medical procedure inadvisable:
禁忌癥：使某種藥物的服用或某種醫(yī)療過程的操作成為不可取的因素：
例句：
A previous allergic reaction to penicillin is a contraindication to the future use of that drug.
以前對青霉素的過敏反應是將來使用該藥物的一種禁忌征象