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See also the list of the top 100 bestselling branded drugs, ranked by sales. Abbreviations are used in the list as follows: INN = International Nonproprietary Name; BAN = British Approved Name; USAN = United States Adopted Name; Two-letter codes for countries
This is a list of abbreviations used in medical prescriptions, including hospital orders (the patient-directed part of which is referred to as sig codes).This list does not include abbreviations for pharmaceuticals or drug name suffixes such as CD, CR, ER, XT (See Time release technology § List of abbreviations for those).
Generally abbreviated to "P.R.N." or "PRN", pro re nata refers to the administration of prescribed medication whose timing is left to the patient (in the case of patient-controlled analgesia), nurse, or caregiver, as opposed to medication that is taken according to a fixed (primarily daily) schedule (a.k.a. "scheduled dosage").
The main discussion of these abbreviations in the context of drug prescriptions and other medical prescriptions is at List of ... PRN as needed pro re nata: q. ...
prn PRN: as necessary (from Latin pro re nata) (if used in chronic pain control, sometimes disparagingly termed "pain relief nil") as needed Prog: prognosis PROM: prelabor rupture of membranes partial range of motion [1] PRP: panretinal photocoagulation platelet-rich plasma progressive rubella panencephalitis: PRRE: purine-rich response element PRV
See the do-not-use list) QIDS: Quick Inventory of Depressive Symptoms: q.l. as much as you like (from Latin quantum libet) q.m.t. also qm: every month q.n. every night QNS q.n.s. quantity not sufficient q.o.d. every other day (from Latin quaque altera die) (deprecated; use "every other day" instead. See the do-not-use list) QOF
A PRN medication delivery is therefore properly done when a physician judges that it should be done, in order to prevent a specified problem from occurring. Oversimplifying, a patient's breakfast could be written as a PRN prescription: give this breakfast to that patient, to prevent that patient from experiencing hunger. pro tem. pro tempore
See also the list of the top 100 bestselling branded drugs, ranked by sales. Abbreviations are used in the list as follows: INN = International nonproprietary name; BAN = British Approved Name; USAN = United States Adopted Name; Two-letter codes for countries