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Glite Dictionary
pro re nata

pro re nata

9.9
Given or done only when needed
  • idiom
  • /proʊ reɪ ˈnɑːtə/
  • Formal
translation icon : según sea necesario
  • He is taking it now pro re nata, four hourly, but no one is fussing.

Examples

  • The doctor advised him to take pain relief pro re nata, only when the discomfort becomes unbearable.

  • In critical cases, the medication should be prescribed pro re nata to avoid unnecessary side effects.

  • She decided to administer the treatment pro re nata, ensuring it was only given when absolutely necessary.

Synonyms

as needed
vspro re nata
25 1.5

When it is necessary

is a Latin medical phrase that serves the same clinical purpose
as required
vspro re nata
17 2.3

Only when needed

is specifically a Latin medical term used for prescriptions rather than rules
PRN
vspro re nata
  • Specialized
8.4

You take medicine only when you need it

is the longer Latin instruction used in clinical writing rather than the short code

How Often

continuously
95 2.3
regularly
386 1.0
pro re nata
  • Formal
9.9
rarely
539 1.0
never
∞ 1.0

Surface Forms

pro re nata positive

Morphology

pro + re + nata

This is a fixed Latin formula used in medical contexts rather than a compositional English phrase; its constituents are not English words and their literal translations (e.g. pro/re/nata) do not transparently yield the procedural meaning 'as needed'. Even if a learner knew the individual Latin components, the semantic shift into a conventional medical instruction is opaque and not predictably derivable, so it would be unfamiliar to a B1 learner without prior exposure.

Etymology

Pro re nata literally means 'for the thing that is born' and comes from the Latin words pro, re, and nata. The simple picture is that you act only when a problem 'appears' or is 'born', so in medicine it means 'as needed' or 'only when necessary'.