Astigmatism, Myopia, Keratoconus......... Want to Know?

Latin words and phrases used in prescriptions.

Abbreviation	Latin	English meaning
a.c.	ante cibum	before meals
b.i.d.	bis in die	twice a day
caps.	capsula	capsule
d.	dies	.day
gtt.	gutta	drop
h.	hore	hour
h.s.	hora somni	at bedtime
o.d.	oculus dexter	right eye
o.h	omni hora	every hour
o.s.	oculus sinister	left eye
o.u.	oculus uterque	each eye
p.c.	post cibum	after meals
p.o.	per os	by mouth
p.r.n.	pro re nata	as needed
q.	quaque	each, every
q.h.	quaqqe hora	every hour
q.i.d.	quater in die	four times a day
sig.	signa	label
sol.	solutio	solution
tab.	tabella	tablet
t.i.d.	ter in die	three times a day
ung.	unguentum	ointment
ut dict.	ut dictum	as directed

Common abbreviation is t meaning one, tt meaning two, ttt meaning three. For example, ttt gtt. means three drops.

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