List of medical abbreviations: Latin abbreviations

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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 there.

Abbrev. Meaning Latin (or New Latin) origin
a.c. Before meals ante cibum
q.o.d Every other day quaque otra die
a.m. Morning ante meridiem
b.i.d. or bid or bd Twice a day/daily bis in die
gtt. Drop(s) gutta(e)
h. Hour hora
h.s. At bedtime hora somni
N.P.O Nothing By Mouth nil per os
o.d. or od once a day
right eye
omne in die
oculus dexter
o.s. or os left eye oculus sinister
o.u. Both eyes oculus uterque
p.c. After food post cibum
p.m. Afternoon post meridiem
p.o. or po Orally per os
p.r. or pr Rectally per rectum
p.r.n. as needed pro re nata
q. every quaque
q.2.h. Every two hours quaque secunda hora
q.4.h. Every four hours quaque quarta hora
q.6.h. Every six hours quaque sexta hora
q.8.h. Every eight hours quaque octava hora
q.a.m. or qam Every morning quaque ante meridien
q.d. or qd Every day/daily quaque die
q.i.d or qds Four times a day quater in die
q.h. Every hour, hourly quaque hora
q.s. A sufficient quantity quantum sufficiat
Rx or Medical Recipe Symbol mod.JPG prescription recipe
Sig. or S. directions signa
Stat. Immediately, with no delay statim
t.i.d. or tid or tds Three times a day ter in die
u.d. As directed ut dictum