Po medical terminology

Po medical terminology DEFAULT


per os

 [per os] (L.)

by mouth.


 (Po) [pah-lo´ne-um]

a chemical element, atomic number 84, atomic weight 210. (See Appendix 6.)

Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.


Abbreviation for per os.

[L. by mouth, that is, orally]


Symbol for polonium.

Farlex Partner Medical Dictionary © Farlex 2012



1. Latin per os (by mouth)

2. personnel officer

3. petty officer

4. postal order

5. post office

6. putout

The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.


1. Parieto-occipital.

2. Per os.

3. Period of onset.

4. Perioperative.

5. Peroxidase.

6. Posterior.

7. Postoperative.

8. Preoptic.

9. Pulmonary valve opening.

McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.


Abbreviation for per os.


Symbol for polonium

Medical Dictionary for the Health Professions and Nursing © Farlex 2012


Abbreviation for per os.

[L. by mouth].

Medical Dictionary for the Dental Professions © Farlex 2012

Sours: //medical-dictionary.thefreedictionary.com/

Oral administration

Route of administration where a substance is taken through the mouth

Oral administration
Oral administration.jpg

Oral administration of a tablet

Other namesBy mouth, per os (PO)

[edit on Wikidata]

A health professional demonstrates how to offer oral medication to a dummy.
Oral administration of a liquid

Oral administration is a route of administration where a substance is taken through the mouth. Per os abbreviated to P.O. is sometimes used as a direction for medication to be taken orally. Many medications are taken orally because they are intended to have a systemic effect, reaching different parts of the body via the bloodstream, for example.[1]


Per os (; P.O.) is an adverbial phrase meaning literally from Latin "through the mouth" or "by mouth". The expression is used in medicine to describe a treatment that is taken orally (but not used in the mouth such as, for example, caries prophylaxis).[2] The abbreviation P.O. is often used on medical prescriptions.


Oral administration includes:

Enteral medications come in various forms, including[1] oral solid dosage (OSD) forms:[3]

  • Tablets to swallow, chew or dissolve in water or under the tongue
  • Capsules and chewable capsules (with a coating that dissolves in the stomach or bowel to release the medication there)
  • Time-release or sustained-release tablets and capsules (which release the medication gradually)
  • Powders or granules

and oral liquid dosage forms:[4]

  • Teas
  • Drops
  • Liquid medications or syrups

Facilitating methods[edit]

Concomitant ingestion of water facilitates in swallowing tablets and capsules.[5] If the substance has disagreeable taste, addition of a flavor may facilitate ingestion.[5] Substances that are harmful to the teeth are preferably given through a straw.[5]

See also[edit]


Sours: https://en.wikipedia.org/wiki/Oral_administration
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  3. Simplicity 860 se snowblower

This article is going to answer the question “what does PO mean in nursing.” Because we all know how frustrating nursing abbreviations can be.

So what does PO mean in nursing? PO in nursing is an abbreviation used to signify “by mouth.” The literal abbreviation PO is an abbreviation of the Latin term that means “per os.” Per os literally means by mouth.

It’s one of the multiple approved joint commission orders you’ll see as a nurse. 

*disclosure some of the links on this site are affiliate links.

PO Meaning in Nursing

Starting out medical abbreviations and terminologies used to confuse me. You might be in the same boat. Let me tell you it does get better with time. Part of that is because abbreviations are commonplace in healthcare to speed up repetitive orders.

Now that you understand what PO means, let me give you some examples. 

Example of PO Orders

Here are some prescription PO order examples of how you might see these orders written.

  1. Colace 100mg PO qhs
  2. Aspirin 81mg PO daily
  3. Acetaminophen 325mg PO q8h PRN for pain
  4. Metformin 500mg PO Daily

So in the case of the orders, this is how you would read them.

  1. Give 100mg of the medication Colace by mouth at bedtime.
  2. Would read give the medication aspiring 81mg by mouth daily.
  3. Would read you can give 325mg of acetaminophen by mouth every 8 hours as needed for pain.
  4. Give 500mg of the drug Metformin by mouth daily.

Resources on Nursing Abbreviations

I do want to point out that understanding nursing abbreviations is essential for your career as a nurse. To help you out I’ve compiled a list of some resources to help you get a grasp of nursing abbreviations.

1. Medical Abbreviations and Acronyms

The medical abbreviations & acronyms quick study pamphlet from Amazon is an excellent way to check abbreviations and references on the fly if you need to.

This pamphlet also has a digital version you can get for the Kindle. Just glancing at the reviews will show you how satisfied other healthcare professionals or students have been after buying this guide.

2. Medical Terminology by David Andersson

If you’re wanting an actual book to study and truly understand medical terminology than this medical terminology book from David Andersson is one you need to check out.

It has received countless good reviews, and there’s even a digital Amazon Kindle version also.

Final Thoughts

Hopefully, you found this article helpful. One last thing I would like to add is that if you don’t understand what an abbreviation means ask a senior nurse.

Do NOT just guess.

If the provider is using an abbreviation that’s not approved per joint commission, you need to clarify the order and/or have them rewrite it.

You can check out joint commission’s do not use abbreviations list here.

Let us know what your thoughts are below. 

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Chalkboard writing of what does po stand for in nursing.
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List of medical abbreviations: Latin abbreviations

Abbrev. Meaning Latin (or New Latin) origin a.c. before mealsante cibum a.d., ad, AD right ear auris dextra a.m., am, AM morningante meridiemnocte every night Omne Nocte a.s., as, AS left ear auris sinistra a.u., au, AU both ears together or each ear aures unitas or auris uterque b.d.s, bds, BDS 2 times a day bis die sumendum b.i.d., bid, bed, BID twice a day / twice daily / 2 times daily bis in die gtt., gtts drop(s) gutta(e) h., h hourhoraqhs, h.s., hs at bedtimeor half strength hora somni ii two tablets duos doses iii three tablets trēs doses n.p.o., npo, NPO nothing by mouth / not byoral administrationnil per os qd, o.d., od, OD once a day
right eyeomne in die
oculus dexter o.s., os, OS left eyeoculus sinister o.u., ou, OU both eyesoculus uterque p.c. after foodpost cibum p.m., pm, PM afternoon or eveningpost meridiemp.o., po, PO orally / by mouth / oral administrationper os / nonstandard formper oremp.r., pr, PR rectallyper rectump.r.n., prn, PRN as needed, (also Pertactin - a key antigen of ac.Pertussis vaccine) pro re nataq. every quaqueqd every dayquaque die q.1.h., q1h every hourquaque hora q.2.h., q2h every 2 hours quaque secunda hora q.4.h., q4h every 4 hours quaque quarta hora q.6.h., q6h every 6 hours quaque sexta hora q.8.h., q8h every 8 hours quaque octava hora q.a.m., qAM, qam every morningquaque ante meridiem q.d., qd every day / daily quaque die q.h.s., qhs every night at bedtime quaque hora somni q.d.s, qds, QDS 4 times a day quater die sumendum q.i.d, qid 4 times a day quater in die q.h., qh every hour, hourly quaque hora q.o.d., qod every other day / alternate days quaque altera die q.p.m., qPM, qpm every afternoon or eveningquaque post meridiem q.s., qs a sufficient quantity (enough) quantum sufficiatq.wk. also qw weekly (once a week) Rx, Rx, prescriptionrecipeSig., S. directionssignaStat. immediately, with no delay, now statimt.d.s, tds, TDS, TID take by mouth 3 times a day ter die sumendus u.d., ud as directedut dictum
Sours: https://en.wikipedia.org/wiki/List_of_medical_abbreviations:_Latin_abbreviations

Terminology po medical


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