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NAPLEX 2023 > math stuff > Flashcards

math stuff Flashcards

1
Q

1 oz = __ g

A

28.4 g

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2
Q

1lb = __ g

A

454 g

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3
Q

1 grain= __ mg

A

64.8 mg

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4
Q

1 meter is ___ cm

A

100 cm

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5
Q

percentage strength=

A

100/ ratio strength

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6
Q

ratio strength=

A

100/percent strength

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7
Q

ppm to percent strength

A

decimal to the left 4

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8
Q

percent strength to ppm

A

decimal to the right 4

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9
Q

SG=

A

g/ml

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10
Q

mosmol/l=

A

(g/mw)xpx1000

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11
Q

E=

A

(58.5)(i)/(MW)(1.8)

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12
Q

mols=

A

g/mw

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13
Q

mmols=

A

mg/mw

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14
Q

mEq=

A

(mgxvalence)/MW or

mmolsxvalence

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15
Q

carbs and protein

A

4cal/gtam

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16
Q

fat

A

9cal/gram

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17
Q

dextrose

A

3.4 cal/gram

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18
Q

amino acid solm

A

4 cal/gram

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19
Q

ile 10
ile 20
ile 30

A

10- 1.1 cal/ml
20-2 cal/ml
30- 3cal/ml

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20
Q

glycerol/glycerin

A

4.3 cal/gram

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21
Q

daily fluid needs

A

1500+(20)(kg-20)

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22
Q

TEE=

A

BEExAFxSF

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23
Q

grams of nitrogen from protein

A

N=protein intake in grams/6.25

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24
Q

crcl

A

(140-age)x(kg)/(72xscr). X0.85 if female

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25
Q

ibw

A

male- 50+2.3(in over 60)

female- 45.5+2.3(in over 60)

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26
Q

adjusted bodyweight

A

ibw+0.4(tbw-ibw)

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27
Q

if underweight which weight to use for drug dosing

A

TBW

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28
Q

for most drugs which weight to use for drug dosing

A

TBW

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29
Q

drugs that require special dosing depending on weight

A 
acyclovir
aminophylline
theophylline
levothyroxine
aminoglycosides
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30
Q 
acyclovir
aminophylline
theophylline
levothyroxine 
if normal weight or obese use which weight
A

IBW

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31
Q

for aminoglycosides if obese use

A

adjusted bodyweight

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32
Q

bun:scr for dehydration

A

> 20:1

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33
Q

AG

A

na-cl-hco3

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34
Q

weak acid pH calculation

A

pH=pka+log(salt/acid)

35
Q

weak base pH calculation

A

pH=pka=log(base/salt)

36
Q

pkb=

A

14-pka

37
Q

%ionization weak acid

A

100/1+10^pka-pH

38
Q

%ionization weak base

A

100/1+10^pH-pka

39
Q

ANC=

A

WBCx(segs+bands/100)

40
Q

C=

A

F-32/1.8

41
Q

F=

A

CX1.8+32

42
Q

TTB (in min)

A

spfxttb(without sunscreen)

43
Q

mean

A

avg

44
Q

median

A

value in the middle of an ordered list

45
Q

mode

A

value that occurs most frequent

46
Q

risk

A

subjects with unfavorable event/total number in a group

47
Q

Relative RIsk

A

risk in treatment/risk in control

48
Q

Relative Risk Reduction

A

1-RR

49
Q

Absolute risk reduction

A

%risk control-%risk treatment

50
Q

NNT or NNH

A

1/ARR (arr is expressed as a decimal

51
Q

OR

A

(AD)/(BC)

52
Q

Hazard ratio

A

hazard rate in treatment/hazard rate in control

53
Q

initiating basal bolus insulin in type 1 diabetes

A
  • calculate TDD using TBW (0.5 u/kg/day)
  • divide into 1/2 basal and 1/2 rapid acting
  • if using nph/r, use 2/3 and 1/3
  • split the rapid among meals
54
Q

insulin to carbohydrate ratio for rapid acting insulin

A

500/TDD= grams of carb covered by 1 unit of insulin

55
Q

insulin to carb ratio for regular insulin

A

450/TDD=grams of carb covered by 1 unit of insulin

56
Q

correction factor for rapid acting

A

1800/TDD= correction factor for 1 unit of insulin

57
Q

correction factor for regular insulin

A

1500/TDD= correction factor for 1 unit of insulin

58
Q

correction dose

A

(bg now)-(target bg)/(correction factor)

59
Q

friedwald equation for LDL

A

LDL= TC-HDL-TG/5

do not use if TG are abpve 400

60
Q

MWQ

A

=sensitivity requirement/0.05

61
Q

bioavailability (F%)

A

100x(aucE/aucI)x(doseI/doseE)

62
Q

volume of distribution

A

vd=amt of drug in body/concentration in plasma

63
Q

cl=

A

kxv

64
Q

cl=

A

dose/auc

65
Q

k=

A

c/vd

66
Q

predicting drug concentrations 1st

A

c2=c1xe-kt

67
Q

prediciting drug concentrations 2nd

A

ke=ln (c1/c2)/t

68
Q

t1/2

A

=0.693/k

69
Q

loading dose=

A

conc.des.xVd/F

70
Q

phenytoin (mcg/ml)=

A

(phenytoin)/(0.2xalbumin)+0.1

71
Q

kcl 10%=

A

20MEQ/15ml

72
Q

calcium carbonate

A

40%

73
Q

calcium citrate

A

21%

74
Q

aminophylline to theophylline

A

ATM (multiply by 0.8)

75
Q

theophylline to aminophylline

A

divide by 0.8

76
Q

loops

A

E 50
F 40
T 20
B 1

77
Q

furosemide iv to po

A

IV:PO
1:2

all other loops 1:1

78
Q

metoprolol IV:PO

A

1:2.5

79
Q

Iron
sulfate
gluconate

A

sulfate: 20%
gluconate: 12%

80
Q

insulin conversions usually

A

1: 1 except
- NPH dosed BID to glargine dosed daily
- toujeo to lantus
- toujeo to basaglar

81
Q

levothyroxine IV to PO

A

IV:PO

0.75:1

82
Q

statins

A 
pharmacists rock at saving lives and preventing flu
P2
R5
A10
S20
L40
P40
F80
83
Q

Steroids

A

cute hot pharmacists and physicians marry together and deilver babies

Cortisone 25
Hydrocortisone 20
Prednisone 5
Prednisolone5
Methylprednisolone 4
Triamcinolone  4
Dexamethasone 0.75
Betamethasone 0.6
84
Q

5 mL lithium citrate syrup=___ mg lithium carbonate = ___ meq lithium ion

A

300mg lithium carbonate, 8 meq lithium ion

NAPLEX 2023 (88 decks)

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