Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

NAPLEX > Required Formulas > Flashcards

Required Formulas Flashcards

(91 cards)

Start Studying
1
Q

1 tsp = ___ mL

A

5 mL

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

1 tbsp = ___ mL

A

15 mL

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

1 fl oz = ___ mL

A

30 mL

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

1 cup = ___oz

A

8 oz

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

1 pint = ___ oz

A

16 oz

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

1 quart = ___ pints

A

2 pints

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

1 gallon = ___ quarts

A

4 quarts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

1 kg = ___ lbs

A

2.2 lbs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

1 oz = ___ g

A

28.4 g

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

1 lb = ___ g

A

454 g

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

1 grain = ___ mg

A

65 mg

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

mEq to mmol for monovalent and divalent ions

A

1:1 for monovalent
1:0.5 for divalent

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

1 inch = ___ cm

A

2.54 cm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

1 meter = ___ cm

A

100 cm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

% w/v equation

A

X g/100mL

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

% v/v equation

A

X mL/100mL

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

% w/w equation

A

X g/100g

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Percentage strength equation

A

100/ratio strength

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Ratio strength equation

A

100/percentage strength

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

PPM –> percentage strength

A

move decimal LEFT 4 places

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Percentage strength –> PPM

A

move decimal RIGHT 4 places

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Specific gravity equation

A

weight of substance (g)/weight of equal volume of water (g)
OR
g/mL

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

dilution and concentration equation (changing strength or quantity

A

Q1 x C1 = Q2 x C2
1 = old
2 = new

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Alligation calculation

A

high % - desired conc = X parts low %
desired conc - low % = X parts high conc

Desired amount / TOTAL parts = weight per part

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Osmolarity equation
mOsmol/L = wt of substance (g/L)/MW (g/mol) x (# of particles) x 1000
26
Isotonicity equation (E value)
(58.5)(i)/(MW of drug x 1.8)
27
Moles and millimoles equation
mols = g/MW mmols = mg/MW
28
Enteral nutrition calories
Carbs, protein = 4 kcal/gram Fat = 9 kcal/gram
29
Parenteral nutrition calories
Dextrose monohydrate = 3.4 kcal/gram Amino acid solution = 4 kcal/gram ILE 10% = 1.1 kcal/gram ILE 20% = 2 kcal/gram ILE 30% = 3 kcal/gram
30
Determining fluid needs equation
When weight > 20 kg: 1500 mL + 20 mL x (weight in kg - 20 kg) Can estimate using 30-40 mL/kg/day
31
Total energy expenditure (TEE)
TEE = BEE x activity factor x stress factor
32
Grams of nitrogen from protein
nitrogen (g) = protein intake (g)/6.25
33
Corrected calcium for albumin < 3.5
Ca + [(4.0-albumin) x 0.8]
34
BMI
weight (kg)/[height (m)]^2 OR weight (lbs)/[height(inches)]^2 x 703
35
Ideal body weight equation (IBW)
Males = 50 + 2.3(number of inches over 5 feet) Females = 45.5 + 2.3(number of inches over 5 feet)
36
Adjusted body weight equation
IBW + 0.4(TBW-IBW)
37
Dehydration equation
BUN:SCr > 20:1
38
Cockcroft-Gault Equation
CrCl = (140-age)(weight)/(72xSCr) (x0.85 if female) Underweight = TBW Normal weight (BMI< 25) = IBW Overweight (BMI>25) = AdjBW
39
How to read an ABG
pH/pCO2/pO2/HCO3/O2 Sat pH<7.35 = acidosis pH>7.45 = alkalosis Respiratory: pCO2<35 = alkalosis; pCO2>45 = acidosis Metabolic: pHCO3 >26 = alkalosis; pHCO3<22 = acidosis
40
Anion gap calculation
Na - Cl - HCO3
41
Weak acid pH calculation
pH = pKa + log[salt/acid]
42
Weak base pH calculation
pH = pKa + log[base/salt]
43
weak acid % ionization calculation
% ionization = 100/[1+10^(pKa-pH)]
44
weak base % ionization calculation
% ionization = 100/[1+10^(pH-pKaA)]
45
ANC calculation
WBC x [(%segs + % bands)/100]
46
Celsius—>Farhenheit
C x 1.8 + 32
47
Fahrenheit —> Celsius
(F-32)/1.8
48
Time to burn calculation
TTB (with sunscreen) = SPF x TTB (without sunscreen)
49
Risk calculation
Number of subjects in group with an unfavorable event/total number of subjects in a group
50
RR (Relative risk)
Risk in treatment group/risk in control group
51
RRR (Relative risk reduction)
(% risk in control group- % risk in treatment group)/% risk in control group
52
ARR (absolute risk reduction)
(% risk in control group) - (% risk in treatment group)
53
NNT (number needed to treat) OR NNH (number needed to harm)
1/ARR ARR expressed as a decimal
54
OR (odds ratio)
AD/BC
55
HR (hazard ratio)
Hazard rate in treatment group/hazard rate in control group
56
Incremental cost-effectiveness ratio
(C2-C1)/(E2-E1)
57
Pack-year smoking history calculation
Cigarette packs/day x years smoked
58
Calculating Basal-Bolus requirements
TDD = 0.5 units/kg/day using TBW Divide in half for basal/bolus split Divide bolus amounts among meals
59
ICR (Insulin to carb ratio) for regular insulin
450/TDD insulin = grams of carbohydrate covered by 1 unit of insulin
60
ICR (Insulin to carb ratio) for rapid-acting insulin
500/TDD insulin = grams of carbohydrate covered by 1 unit of insulin
61
Correction Factor for regular insulin
1500/TDD insulin = correction factor for 1 unit of insulin
62
Correction Factor for rapid-acting insulin
1800/TDD insulin = correction factor for 1 unit of insulin
63
Correction dose
(BG now - target BG)/CF = correction dose
64
Friedewald equation (LDL)
TC - HDL - (TG/5) *do not use if TG > 400
65
Minimum weighable quantity
Sensitivity requirement/acceptable error weight (usually 0.05)
66
BSA (Mosteller)
sqrt(ht(cm)xwt(kg)/3600)
67
Bioavailability (F)
100 x AUC(extravascular)/AUC(intravenous) x dose(intravenous)/dose(extravascular)
68
Volume of distribution (Vd)
amount of drug in the body/concentration of drug in plasma
69
Clearance equation
F x dose/AUC OR ke x Vd
70
Elimination rate constant (ke)
Cl/Vd
71
Predicting drug concentrations equation
C2=C1xe^(-kt) OR Ke=[ln(C1/C2)]/t
72
Half-life equation
t1/2=0.693/ke
73
Loading dose (LD)
Desired concentration x Vd/F
74
MAP equation
[(2 x DBP) +SBP]/3
75
Phenytoin (total) concentration for albumin < 3.5
total phenytoin measured/[(0.2 x albumin) + 0.1]
76
KCL solution to tablets KCl 10% = _____ mEq/___mL
20mEq/15mL
77
% elemental calcium in calcium carbonate
40%
78
% elemental calcium in calcium citrate
21%
79
Aminophylline --> Theophylline
Multiply by 0.8 (ATM)
80
Theophylline to Aminophylline
Divide by 0.8
81
Statin equivalents
Pitavastatin = 2 mg Rosuvastatin = 5 mg Atorvastatin = 10 mg Simvastatin = 20 mg Lovastatin = 40 mg Pravastatin = 40 mg Fluvastatin = 80 mg Pharmacists rock at saving lives and preventing fatty deposits
82
Metoprolol IV:PO
1:2.5
83
Loop diuretics equivalents
Ethacrynic acid = 50 mg Furosemide = 40 mg Torsemide = 20 mg Bumetanide = 1 mg
84
Furosemide IV:PO
1:2
85
Other loops IV:PO
1:1
86
Insulin conversions
Usually 1:1 EXCEPT NPH dosed BID --> glargine daily dosing, use 80% of NPH dose Toujeo --> other forms of glargine or detemir, use 80% of Toujeo dose
87
Levothyroxine IV:PO
0.75:1
88
Steroids conversions
Cortisone = 25 mg Hydrocortisone = 20 mg Prednisone = 5 mg Prednisolone = 5 mg Methylprednisolone = 4 mg Triamcinolone = 4 mg Dexamethasone = 0.75 mg Betamethasone = 0.6 mg
89
Steps to convert an opioid
1. Calculate 24 hr total dose of the current drug 2. Use the ratio conversion to calculate the dose of the new drug 3. IF SPECIFIED TO REDUCE DOSE FOR CROSS-TOLERANCE, reduce dose at least 25% 4. Divide for the new drugs appropriate interval and dose
90
5 mL lithium citrate syrup = ___ mg lithium carbonate = ___ mEq Li+ ion
5 mL lithium citrate syrup = 300 mg lithium carbonate = 8 mEq Li+ ion
91
Minimum weighable quantity
Sensitivity requirement/acceptable error weight (expressed as a decimal)

NAPLEX (81 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions