Common Prescription Abbreviations (Sig Codes)

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Last updated 1:20 AM on 9/16/26
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90 Terms

1
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a

before

2
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aaa

apply to the affected area

3
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a.c, AC

before meals

4
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ad, a.d, AD

right ear

5
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AM, a.m.

morning

6
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APAP

acetaminophen; Tylenol

7
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as; a.s.; AS

left ear

8
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ASA

aspirin

9
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au; a.u.; AU

both ears; each ear

10
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b.i.d.; BID

twice daily

11
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BUD

beyond-use date

12
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°C

degrees centigrade; temperature in degrees centigrade

13
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Ca

calcium

14
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cap

capsule; capsules

15
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CSP

compounded sterile preparation

16
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d

daily

17
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DAW

dispense as written

18
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DC; d/c

discontinue

19
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D/C

discharge

20
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disp

dispense

21
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EC

enteric-coated

22
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Elix

elixir

23
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ER; XR; XL

extended-release

24
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°F

degrees Fahrenheit; temperature in degrees Fahrenheit

25
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f.i.d; FID

five times daily

26
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g, G

gram

27
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gr

grain

28
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gtt; gtts

drop; drops

29
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h; hr

hours

30
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HC

hydrocortisone

31
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HCTZ

hydrochlorothiazide

32
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HIPAA

Health Insurance Portability and Accountability Act

33
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HMO

Health Maintenance Organization

34
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h.s.

at bedtime

35
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IM

in the muscle; intramuscular

36
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K; K+

potassium

37
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KCI

potassium chloride

38
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kg

kilogram

39
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L

liter

40
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lb

pound

41
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mcg; ug*

microgram

42
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MDI

metered-dose inhaler

43
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mEq

milliequivalent

44
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mg

milligram

45
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mL

milliliter

46
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Na

sodium

47
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NR

no refills

48
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od; o.d.; OD

right eye

49
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OPTH; OPHTH; Opth

ophthalmic

50
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os; o.s.; OS

left eye

51
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OTC

over the counter; no prescription required

52
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ou; o.u.; OU

both eyes; each eye

53
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oz

ounce

54
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p.c.; PC

after meals

55
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PM; p.m.

afternoon; evening

56
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PO; po

orally; by mouth

57
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PR

per rectum; rectally

58
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PRN; p.r.n.

as needed; as occasion requires

59
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q

every

60
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q.h.; qhour

every hour

61
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q2h

every 2 hours

62
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q4h

every 4 hours

63
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q6h

every 6 hours

64
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q8h

every 8 hours

65
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q12h

every 12 hours

66
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q24h

every 24 hours

67
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q48h

every 48 hours

68
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QAM; qam

every morning

69
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qDay; QD

every day

70
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q.i.d.; QID

four times daily

71
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QOD; Q other day; Q.O. Day

every other day

72
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QPM; qpm

every evening

73
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qs; qsad

quantity sufficient; a sufficient quantity to make

74
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QTY; qty

quantity

75
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qwk; qweek

every week

76
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Rx

prescription; pharmacy; medication; drug; recipe; take

77
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sig

write on label; signa; directions

78
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SL; sub-L

sublingual

79
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SR

sustained-release

80
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SS; ss

one-half

81
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SUPP; Supp

suppository

82
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susp

suspension

83
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t; tab; ts;

tablet; tablets

84
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TAT

until all taken

85
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TBSP; tbsp

tablespoon; tablespoonful; 15ml

86
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TSP; tsp

teaspoon; teaspoonful; 5 ml

87
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t.i.d; TID

three times daily

88
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ud; utd

use as directed

89
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VAG; vag

vagina; vaginally

90
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w/o

without