Interpret the Following Drug Orders or Write Drug Orders Using $\frac { 1 } { 4 }$

Essay

Interpret the following drug orders or write drug orders using correct medical abbreviations based on the supplied information.
The drug orders are presented for practice only, and actual prescribed dosages will vary according to a patient's age, condition, reaction, additional medications, and other factors.
-codeine gr $\frac { 1 } { 4 }$ p.o. q.4h p.r.n., pain.