prn

As occasion requires

Prn is medical and pharmaceutical shorthand for "as needed," from the Latin *pro re nata* (as the situation demands).

A medication prescribed prn is taken when symptoms require it rather than on a fixed schedule: Take one tablet every four hours prn for pain.

In texting and social media, prn is sometimes shorthand for porn.

medical

prescription

Medical dispensing authorization

dispense · nurse · charting · patient · treatment · therapy · dose · pharmacist · healthcare · regimen

programming

pseudorandom

Algorithmically generated, mimicking chance

  • randomOccurring without pattern
  • generatorElectricity-producing machine
  • seedEmbryonic plant capsule

algorithm · entropy · stochastic · noise · Monte Carlo · simulation · cryptography · RNG · distribution · deterministic

Opposites
dosing schedule regularity

prnscheduled

Arranged for specific time

standing order · routine · regular · around-the-clock · ATC

administration trigger

prnmandatory

Required by rule

time-based · predetermined · automatic · standing · baseline

Family

pro

Familiarity
Top 1,000,000
Profile
Used worldwide · Timeless · Abstract · Rated G