NAPLEX Equations and Conversions

CrCl Equation (M)

140-age/72*Scr * weight (kg)

CrCl Equation (F)

140-age/72*Scr * weight(kg) * 0.85

Ideal Body Weight (IBW) Equation (M)

50kg + (2.3*every in over 5 ft)

Ideal Body Weight (IBW) Equation (F)

45.5kg + (2.3*every in over 5 ft)

Percentage —> ratio strength conversion

100/percentage strength

Ratio —> Percentage strength conversion

100/ratio strength

PPM —> percentage strength conversion

Move decimal place left 4 places

Percentage strength —> PPM conversion

Move decimal place right 4 places

Osmolarity Equation

Substance weight (g/L)/MW (g/mol) * particle # * 1000

Milliequivalents Equation

Mg(valence)/MW OR mmol*valence

ANC Equation

WBC * [(% sets + % bands)/100]

Celsius —> Fahrenheit Conversion

(C*1.8)+32

Fahrenheit —> Celsius Conversion

(F-32)/1.8

Nitrogen Equation

Protein/6.25

Adjusted Body Weight (AdjBW) Equation

IBW + 0.4(TBW-IBW)

pH of weak acid equation

Pka + log[salt/acid]

pH of weak base equation

Pka + log[base/salt]

RR

Risk in treatment group/risk in control group

ARR

% risk in treatment group -% risk in placebo group

RRR

1-ARR

Odds Ratio

AD/BC

Hazard Ratio

Treatment/control

Morphine IV and PO Equivalent

10mg IV=30mg PO

Hydromorphone IV and PO Equivalent

1.5mg IV=7.5mg PO

Clearance Equations

F*dose/AUC OR ke*Vd