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Pro Re Nata

临机应变；为意外事件（for an unexpected contingency））

1、临机应变

[0104] ″根据需要″的给药，也叫做″临机应变(pro re nata)″或″ prn″给药，以及″经要求″的给药或施用，其意指当希望抑制IBS 的疼痛和非疼痛症状时，或希望抑制

2、必要时

... •post cibum (pc)[饭后（给药）] •hora somni (hs)[临睡时] •pro re nata (prn)[必要时] ...

adv.according to need (physicians use PRN in writing prescriptions)

同义词：as neededas requiredPRN

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