Pro re nata
From Self-sufficiency
Revision as of 02:03, 6 October 2005 by 63.81.122.66 (Talk)
Pro re natat or PRN - meaning as needed or as the situation demands, is often used on prescriptions by doctors to indicate when a medication should be taken. This is often drugs that can be taken should a situation calls for it. For example, a patient can take a Asprin PRN - headache; meaning he can take the medication when he feels it is needed to remedy a headache.
