pro re nata
phraseUS /ˌpɹoʊˌreɪˈnɑ.tɑ/
Etymology From the Latin phrase pro (“for”) rē (“thing, matter”) nātā (“born, arisen”): "for what arises".
1
Dealing with something that arises unexpectedly or out of due course; for special business.
2
Medicine, Sciences Used on medical charts by doctors to indicate that actions may be taken at the discretion of nursing staff depending on the patient's condition.
3
Medicine, Pharmacology, Sciences Used on prescriptions to indicate that the medicines may be taken if and when the patients feel the need.