Can you abbreviate properly?

Before meals

http://24pills.org

a.c.

q.h.

t.i.d.

Correct! Wrong!

As needed, according necessity

unitedadlabel.com

stat

tbsp

prn

qod

Correct! Wrong!

"Pro re nata"

After meals

yaoota.com

p.c.

liq.

a.m.

Correct! Wrong!

As desired

http://acronymsandslang.com

a.d.

ad. lib

a.u.

per os

Correct! Wrong!

By mouth

care2.com

noct.

per os.

q.s.

sol.

Correct! Wrong!

Hypodermic

slideshare.net

inj.

Correct! Wrong!

Intravenous piggyback

http://slideplayer.com

IVP

inj.

IVPB

porp.

Correct! Wrong!

Drop

http://all-free-download.com

D/C, dc

gtt

Correct! Wrong!

Right ear

factrange.com

tinct.

A.D.

elix.

Correct! Wrong!

At bedtime

amazon.com

noct.