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Abbrev. [1]Meaning [1] Latin (or Neo-Latin) origin [1]; a.c. before meals: ante cibum a.d., ad, AD right ear auris dextra a.m., am, AM morning: ante meridiem: nocte ...
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").
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 pro re nata "for the thing born" As used in standard medical jargon, PRN is understood to mean "as needed". This reading of the abbreviation implies that the delivery of the prescription (by a suitable person, following a medications protocol) is done in a reactive, passive way, e.g., "when that happens, do this".
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
IV intravenous(ly) IVU intravenous urography K potassium kcal kilocalorie(s) mean food calorie kg kilogram(s) L liter(s)/litre(s) lb pound(s) LDH lactic dehydrogenase LDLc low-density lipoprotein cholesterol M molar m meter(s)/metre(s) mane in the morning mc micro- required in some regions to avoid the confusion of 'μ' with 'm' ('milli-').
Term Description (notes) A.d. As directed bd/bid Twice a day gt One drop gtt drops GSL General sales list Gutt/g Guttae (drops) Meds Medications Nocte/QHS At night Occ Ointment od/QD Once a day otc Over the counter (bought medication) P Pharmacy (drug) POM Prescription-only medicine prn When required q Every (e.g. q2h – every two hours) qds/qid
MPS IV Mucopolysaccharoidosis type IV (see Morquio syndrome) MPS VI Mucopolysaccharoidosis type VI (see Maroteaux–Lamy syndrome) MPS VII Mucopolysaccharoidosis type VII (see Sly syndrome) MPX Monkeypox: MR/DD Mentally retarded/developmentally disabled: MS Multiple sclerosis: MSA Multiple system atrophy: MSDD Multi-sensory developmental delays