D dimer: While d dimer is often used to help diagnose blood clots, it can also be elevated with inflammation. ... Read more Dr. Ed Friedlander Dr. Friedlander
Definition of regimen. 1  1a : a systematic plan (as of diet, therapy, or medication) especially when designed to improve and maintain the health of a patientb : a regular course of action and especially of strenuous training the daily regimen of athletes. 2  2 : government, rule. 3  3 : regime 1c.
Rating Newest Oldest. Best Answer: PRN means 'per diem' the latin word for 'as needed'. In other words the medication is not given on a scheduled basis or at certain times. Medication of this sort is usually pain medication and patients 'ask' for it.