Pharmacology Abbreviations

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ad lib
as much as desired

Bid
twice daily

BSA
body surface area

C
with

Cal
calorie

Cap
capsule

cc
cubic centimeter

Conc
Concentration

D5W
5% dextrose in water dr dram; equal to 1/8oz or 4ml

ED
Effective dose

ED50
Median effective dose

Gal
gallon

G
Gram

Gr
Grain; unit of weight approximately 65mg

gt
Drop

gtt
Drops

IA
Intra-arterial ; injection into an artery

IC
Intracardiac; injection into heart

ID
Intradermal; injection in the skin

IM
Intramuscular; injection in the muscle

ac
before meals

IP
Intraperitoneal; injected into the mouth

IT
Intratracheal; injected into throat(trachea)

IU
International units

IV
Intravenous; injection into a vein

Intra
Within

Peros
Mouth

LD
Lethal dose

®
Registered trade name when superscript by drug name

LD50
Median lethal dose

LRS
Lactated Ringer’s solution

M
Meter

Mcg or ug
Microgram

mED
Minimal effective dose

mEq
Milliequivalent

MIC
minimum inhibitory concentration

MID
Minimum infective dose

MLD
Minimum lethal dose

Npo
nothing by mouth

NS
normal saline

OTC
over the counter

P
after

Pc
after meals

PDR
Physicians dest reference

pH
Hydrogenion concentration (acidity and alkalinity measurement)

Po
orally, by mouth

ppm
parts per million

PR
per rectum

prn
as needed

Pt
Pint

Q
every

Qd
Every day

Qh
Every hour

Qid
four times daily

Qn
Every night

Qod or eod
Every other day

Qp
As much as desired

Qt
Quart

Rx
Prescription

S
without

Sid
once daily

Sig
Let it be written as

Sol’n or soln
Solution

Sq, sc, subq, or subc
Subcutaneous

T
Tablespoon, tablet or temperature

Tab
tablet

Tid
three times a day

VPB
Veterinary pharmaceuticals and biologicals

A
Ears

O
Eyes

S (face)
Left

D (face)
Right

U (face)
Both

AAA
apply to affected area

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We use cookies to give you the best experience possible. By continuing we’ll assume you’re on board with our cookie policy What does it mean that DR interactions are concentration dependent? It means that as the concentration of the drug …

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