#
number of quantity (Tylenol #3)
&
and
%
percent or percentage
%DV
percent daily value(s)
1°, 2°
1 hour, 2 hours, etc.
aa
of each, affected area
AAA
apply to affected area
ac or ic
before meals (“before a meal” if once daily dosing)
ad
right ear or as directed or up to
am
morning, in the morning, before noon
amp
ampule or ampul
amp (drug)
ampicillin
APAP
acetaminophen (tylenol)
apl, app
applicatorful or applicator (for vaginal creams)
aq, H20
aqueous (water)
as
left ear
au
each ear, both ears
AUD
apply as directed
a, an
before, without, ear
ADD
attention deficit disorder
ADHD
attention deficit & hyperactivity disorder
ad lib
as often or as much needed
aft
afternoon
AIDS
acquired immune deficiency syndrome