pharmaceutical calculations upload

8/11/2019 Pharmaceutical Calculations upload

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Introduction to Pharmaceutical

Calculation


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Pharmaceutical Calculation

application of basic mathematical

calculations to ensure safe and effective

pharmaceutical and medication

preparation.

Accurate calculation of formulas and

conversions are vital.


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Application of Pharm Calc to

Pharmacy Practice

Dose calculation

Temperature conversion

Flow Rates

Measurement conversion


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Application of Pharm Calc to

Pharmacy Practice

Dilution

Solution concentration

Ingredient calculation for compounds

Prescription quantity calculation


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Importance of Pharmaceutical

Calculation Skills

Ensure accuracy

Ensure patient safety by providing correct

dose

May cause harm to patient if not done

properly

To avoid under-dosing To avoid overdosing


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Review of Basic Algebraic

Functions

1. Addition

2. Subtraction

3. Multiplication

4. Division


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Addition

Component parts

Addendstwo numbers that are added

Totalanswer to an addition problem

- also called sum


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Addition

Addition Symbol: +

Total or Sum Symbol: =or ________


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Subtraction

The difference between two numbers Component parts

Differencethe answer to a subtraction

problem Minuendupper number

Subtrahendlower number

Ex: 702 - minuend

- 512 - subtrahend190difference

Symbol : -


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Multiplication

repeated addition

Component parts

Factorsnumbers that are multipliedtogether

Productresult of multiplication

problem Symbol : x


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Division

Expressed in several ways

Ex: 100 / 20 = 5

dividend divisor quotient

100 20 = 5

dividend divisor quotient

5 quotient

20 100 dividend

divisor


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Practice Problems

Mr. Haddad gave you a prescription for

Metoprolol 50mg two times daily. Compute

the total amount of Metoprolol (in mg) he

will consume in 7 days.


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Solution

Metoprolol 50mg

x 2 ( times per day)100mg per day total

Then

100 mg per day

x 7 daysAnswer: 700 mg per week of Metoprolol total


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Practice problems

Pharmacy technician Omar Syed was

instructed to repackage 920 milliliters (mls)

bottle of wound care solution into 8 bottles.

How many milliliters of wound caresolution will each bottle contain?


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Solution

Divide the 920 mls solution bottle by 8bottles

920ml 8 bottles = 115 mls per bottle

answer


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Roman numerals

Symbol

ss

I

VX

L

C

D

M

Equivalent

or 0.5

1

5

10

50

100

500

1000


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Practice exercise

Convert the following Roman numerals to Arabicnumerals:

IV = _______ DCV = ______

LXXIII = ______ VII = ________

XXXVII= ______ MCCCXLII = ______

XCI = _______ CDLV = _______


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