List of medical abbreviations: Latin abbreviations
The main discussion of these abbreviations in the context of drug prescriptions and other medical prescriptions is at List of abbreviations used in medical prescriptions. Some of these abbreviations are best not used, as marked and explained here.
Abbrev. | Meaning | Latin (or New Latin) origin |
---|---|---|
a.c. | before meals | ante cibum |
a.d., ad, AD | right ear | auris dextra |
a.m., am, AM | morning | ante meridiem |
nocte | 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, bd | twice a day / twice daily / 2 times daily | bis in die |
gtt., gtt | drop(s) | gutta(e) |
h., h | hour | hora |
h.s., hs | at bedtime or half strength | hora somni |
ii | two tablets | duos doses |
iii | three tablets | trēs doses |
n.p.o., npo, NPO | nothing by mouth / not by oral administration | nil per os |
o.d., od, OD | once a day right eye |
omne in die oculus dexter |
o.s., os, OS | left eye | oculus sinister |
o.u., ou, OU | both eyes | oculus uterque |
p.c. | after food | post cibum |
p.m., pm, PM | afternoon or evening | post meridiem |
p.o., po, PO | orally / by mouth / oral administration | per os / nonstandard form per orem |
p.r., pr, PR | rectally | per rectum |
p.r.n., prn, PRN | as needed, (also Pertactin - a key antigen of ac.Pertussis vaccine) | pro re nata |
q. | every | quaque |
q.1.d., q1d | every day | quaque die |
q.1.h., q1h | every hour | quaque 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 morning | quaque 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 evening | quaque post meridiem |
q.s., qs | a sufficient quantity (enough) | quantum sufficiat |
q.wk. also qw | weekly (once a week) | |
Rx, Rx, , ℞ | prescription | recipe |
Sig., S. | directions | signa |
Stat. | immediately, with no delay, now | statim |
t.d.s, tds, TDS | 3 times a day | ter die sumendum |
t.i.d., tid | 3 times a day | ter in die |
u.d., ud | as directed | ut dictum |
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