I'm a disability carer also responsible for administering medication so come across abbreviations quite often.
The abbreviation you have means Take 1 via mouth 4 times a day, as required. po is mouth or oral, qid is 4 times a day and PRN is a term that used for medcation that is only to be taken as required. Im not sure what your medication is for, but It would mean if feel you need your medication because your illness is worsening or bothering you etc, you are to take 1 tablet, via mouth, 4 times a day until you no longer need it.
Hope this helps :)
p.o.~ By mouth
tid~ three times a day
prn~ as needed
i gtt ou qhs x 7 days
2 a day
its an medic
For medications, bid: Take twice a day PRN: as needed So this would mean to take the medication twice a day, as needed.
PRN does not do anything to a patient. It is a medical abbreviation that means "as needed". A medication or treatment ordered as PRN means to give it as needed.
Two inhalations every 6 (hours) or as needed.