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prn

From Wiktionary, the free dictionary
See also: PRN and p.r.n.

English

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Phrase

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prn

  1. (medicine) Abbreviation of pro re nata.
    Alternative forms: PRN, p.r.n.
    • 1988, E[dward] J[ames] Moran Campbell, Not Always on the Level, [London]: British Medical Journal, →ISBN, page 182:
      “‘My return fare was £171. 6s. 0d. and I enclose the counterfoil. I have no record of other expenses; the major items were chilled liquid sedatives on the flight home at 55 cents a shot. Although taken prn, the last dose I remember is the fourth.”

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