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calculation equations > Formulas > Flashcards

Formulas Flashcards

1
Q

tsp (t)

A

5 mL

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2
Q

tbsp (T)

A

15 mL

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3
Q

1 f oz

A

30 mL (actual 29.57 mL)

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4
Q

1 cup

A

8 oz, 240 mL (approx.); 236.56 mL (actual)

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5
Q

1 pint

A

16 oz, 480 mL (approx.); 473 mL (actual)

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6
Q

1 quart

A

2 pints, 960 mL (approx.); 946 mL (actual)

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7
Q

1 gallon

A

4 quarts, 3,840 mL (approx.); 3,785 mL (actual)

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8
Q

1 kg

A

2.2 pounds (lbs)
.
So to find Lbs from Kg? x 2.2

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9
Q

1 oz (to grams)

A

28.4 grams (g)

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10
Q

1 lb to grams

A

1 lb = 454 g

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11
Q

1 grain to mg

A

1 grain = 65 mg (approx.); 64.8 mg (actual)

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12
Q

Inch (in) to cm

A

2.54 centimeters (cm)

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13
Q

cm to mm

A

x 10

cm –> mm? cm * 10 = mm

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14
Q

Meter (m) to cm

A

Meter (m) = 100 cm

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15
Q

Ratio Strength

A

Percentage strength(%)= 100 / Ratio strength
.
Ratio strength(#:#) = 100 / Percentage strength

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16
Q

Parts Per Million (PPM) and percentage strength

A

PPM –> Percentage strength Move the decimal left 4 places to get % strength
.
Percentage strength–> PPM Move the decimal right 4 places (to get PPM)

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17
Q

Calculations of ppm
Express 5 ppm of iron in water in percentage strength and ratio strength

A

PPM to percentage? think of 1 PPM as 1/1,000,000… which is 0.000001 or *100 = 0.0001%
.
So 5 PPM = 5/1,000,000 = 0.000005% or *100 = 0.0005%
.
LONG STORY SHORT = divide ppm/10,000

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18
Q

% strength to PPM?

A

Just multiple % * 10,000!

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19
Q

Changing Strength or Volume (Dilution & Concentration)

A

Q1 x C1 = Q2 x C2
.
Q1 = old quantity Q2 = new quantity
C1 = old concentration C2 = new concentration

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20
Q

Osmolarity

A
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21
Q

Isotonicity (E-value)

A

E = (58.5)(i)/ (MW of drug)(1.8)

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22
Q

mEq

A

mg * valance / mw

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23
Q

BMI (kg/m2)

A

kg/m^2
or
lbs/inches^2 * 703

24
Q

Ideal Body Weight (IBW) male? female?

A

IBW (males) = 50 kg + (2.3 kg)(number of inches over 5 feet)
.
IBW (females) = 45.5 kg + (2.3 kg)(number of inches over 5 feet)

25
Q

AdjBW

A

IBW + 0.4(TBW – IBW)

26
Q

CrCl (mL/min)

A
27
Q

Mean, Median and Mode

A

Mean - the average value
.
Median - the value in the middle of an ordered list
.
Mode - the value that occurs most frequently

28
Q

Relative Risk (RR)

A

suck in treatment/ suck in control

29
Q

Relative Risk Reduction (RRR)

A

%SC-%ST/ %SC * 100

30
Q

Absolute Risk Reduction (ARR)

A

ARR = (% risk in control group) – (% risk in treatment group) .. . think of top RRR *100

31
Q

NNT (ROUND UP)

A

1/ %SC-%ST

32
Q

Odds Ratio (OR)

A
33
Q

Sensitivity and Specificity

A
34
Q

Pack year smoking hx

A

cig packs/day * years smoked

35
Q

Incremental cost ratio

A

C2-C1/ E2-E1

c= cost
e= effects

36
Q

Minimum weighable quantity MWQ

A

MWQ = sensitivity requirement/ acceptable error rate (usually 0.05)

37
Q

Bioavailability (F)

A

F% = 100* AUC extra/AUC intra * Dose intra/Dose extra

38
Q

Volume of distribution

A

Vd = amount of drug in body (in mg) / conc of drug in plasma (peak level in mg/L)

39
Q

Clearance (CI)

A

CI = Fdose/ AUC
or
CI = keVd

40
Q

Half life t1/2

A

t1/2 = 0.693/ke

41
Q

Loading Dose

A

(desired conc * Vd) / F

42
Q

Common Valance to know?

A
43
Q

of particles dissociation?

A
44
Q

IV dose to oral dose formula?

A

IV dose = oral dose * (bioavailability/ 100)

45
Q

mg to dL
.
ml to dL

A

1 mg = 0.01dL
.
mL —> dL (ml * 100) 100mL is 1 dL

46
Q

mcg to mg

A

1 micrograms (mcg) is equal to 0.001 milligrams (mg). Conversely, 1 milligrams (mg) is equal to 1000 micrograms (mcg).

47
Q

Relative Risk

A
48
Q

Relative Risk Reduction

A
49
Q

Absolute Risk Reduction

A

no neg

50
Q

NNT/NNH

A

NNT = round up
NNH = round down

51
Q

1 ppm to mg?

A

1 ppm = 1 mg per liter

52
Q

Million

A

1,000,000 (6 zeros)

53
Q

Young’s rule

A
54
Q

Density

A

Density = mass/volume (g/mL)
.
SIMILAR TO SG!!!!

55
Q

Specific Volume

A

Volume of substance (mL sub) / Volume of equal weight of water (mL h20)

56
Q

From the following formula for 40 sertraline capsules, calculate the factor that would be used if a pharmacist wished to prepare 250 capsules

A

Factor = want/give
.
F = 250/40 = 6.25
so wanna know gram needed? x 6.25!

calculation equations (1 decks)

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