PTCB

Comprehensive study of ptcb covering fundamental concepts and advanced applications.

Basic Concepts

Pharmaceutical Calculations

Pharmacy technicians must use math skills every day—calculating dosages, converting units, and preparing accurate prescriptions.

Dosage Calculations: Determining how much medication a patient needs.
Conversions: Switching between milligrams (mg), grams (g), milliliters (mL), and liters (L).
Days’ Supply: Figuring out how long a prescription will last.

\( \text{Dose} = \frac{\text{Desired Dose}}{\text{Stock Strength}} \times \text{Quantity} \)

Converting 500 mg to grams: \( 500,\text{mg} = 0.5,\text{g} \).
Calculating how many 250 mg tablets are needed for a 1000 mg dose: \( 1000 \div 250 = 4 \) tablets.

Practice makes perfect! Fast, accurate math keeps things running smoothly and safely.

\[\text{Dose} = \frac{\text{Desired Dose}}{\text{Stock Strength}} \times \text{Quantity}\]

A prescription calls for 2 teaspoons (10 mL) of amoxicillin twice a day for 7 days. The technician calculates how many mL to dispense.
A child needs 75 mg of medication, but the tablets are 25 mg each. The technician dispenses 3 tablets per dose.

Math skills help technicians prepare and check medications accurately.

Conversion

Changing from one unit to another, such as mg to g.

Days' Supply

The number of days a prescription will last, based on the dosage and quantity given.

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