1. Objectives Chapter 14 Calculate dosage by body weight
Convert weights between pounds and kilograms
Calculate individual and daily dosages
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2. Basic Dosage by Body Weight
Unit 14

3. Page 282
Overview
In a clinical setting, the body weight used is in kilograms and the recommended doses come in mg/kg, mcg/kg, and mL/kg.
Special population drugs orders such as pediatric and geriatric medications are often calculated based on weight.
These drug orders will state a medication amount per patient weight for a specific time.
Many over-the-counter (OTC) medications for children, such as pain relievers, cold medications, and fever reducers, come in containers that have printed dosing instruction. Manufactures know that parents know the weight of their children in pounds; thus, the printed dosing instructions come in teaspoons per age and pound limits.

4. Conversion to Kilograms
Page 284
Conversion to Kilograms
Convert the weight from pounds into kilograms
Proportions Method
Dimensional Analysis
1 kilogram
2.2 pounds
x kilogram
pounds given in problem =
Round the nearest hundred at this point.
Examples – page 285 – practice 1: evens
Group Work – page 285 – practice 1: odds
pounds given in problem
1 kilogram
2.2 pounds x
= _____ kg

5. Converting Pounds and Ounces
Page 285
Converting Pounds and Ounces
When a weight includes ounces and pounds use the same method as before but first convert the ounces into pounds.
For example: 14 pounds 4 ounces 4 16 1 4
14.25 pounds
14 pounds 4 ounces = 14 = 14 =
Examples – page – practice 2: evens
Group Work – page – practice 2: odds

6. Calculating Dosage Pages 286 – 288
After you calculate the kilograms. The next step is to calculate the dosage by multiplying the dose ordered by the weight in kilograms. This will give you either the daily dosage or the individual dosage it depends on the way the problem is worded.
Other dosage [divide (to get the ID) or multiplied (to get the DD)] by how many times administered in a day
Examples – page – practice 3: evens
Group Work – page – practice 3: odds