prn

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prn

(in prescriptions) abbreviation for
(Pharmacology) pro re nata
[Latin: as the situation demands; whenever needed]

p.r.n.

(in prescriptions) as the occasion arises; as needed.
[< Latin prō rē nātā]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adv.1.prn - according to need (physicians use PRN in writing prescriptions)PRN - according to need (physicians use PRN in writing prescriptions); "add water as needed"