ad libitum

freely as wanted

ana

of each

ante

before

cum (haha...)

with

ante cibum

before meals

post cibum

after meals

aqua

water

omne die

every day

semel in die

once a day

b.i.d.

bis in die

twice a day

ter in die

three times a day

quarter in die

four times a day

q4h

quaque 4 hora 

every 4 hours

q6h

quaque 6 hora

every 6 hours

divide

divide

dosis

a dose

equqlis partis

equal parts

misce

mix

fiat

make

capula

capsule

haustus

drench

gutta

a drop

octarius

pint

non repetatur

not to be repeated

oculus sinister

left eye

oculus dexter

right eye

oculus uterque

each eye

auris sinistra

left ear

auris dextra

right ear

auris unitas

both ears

quaque

every

hora

hour

die

day

quaque latera die

every other day (q2d)

pro re nata

as needed