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Download as PDF; Printable version; In other projects ... prn, PRN as needed pro re nata: q. every ... tid, TID 3 times a day ter in die t.d.s., tds, TDS ...
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).
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
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").
Pronunciation follows convention outside the medical field, in which acronyms are generally pronounced as if they were a word (JAMA, SIDS), initialisms are generally pronounced as individual letters (DNA, SSRI), and abbreviations generally use the expansion (soln. = "solution", sup. = "superior").
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TID: three times a day (from Latin ter in die) TIN: tubulointerstitial nephritis: TIPS: transjugular intrahepatic portosystemic shunt: TKA: total knee arthoplasty: TKO: to keep (vein) open for IV therapy TKR: total knee replacement: TKVO: to keep vein open TLA: three letter acronym TLC: total lung capacity, or total lymphocyte count TLE ...
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