What is the medical term meaning as needed?

Answer 1

prn is the medical abbreviation meaning when required or requested.
Pro re nata which is commonly seen or heard as prn. Pro re nata is Latin and literally means, for the thing born.
PRN is the medical abbreviation for as necessary.

Answer 2

Pro re nata

or shortened to PRN.

Answer 3

Abbreviated as "PRN" or "prn"
Prn or prn.PRN stands for pro re nata which means as required.

Answer 4

prn