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Dosage Calculations

January 14, 2014

Warm Up
4 kg = _____ g

.45 mg = _____g
Objective:  Using math for medicine.

Jan 5­1:36 PM

HW #3 practice problems all

1
Dosage Calculations

January 14, 2014

Jan 4­11:31 AM

HW #3 practice problems all

2
Dosage Calculations

January 14, 2014

Medication may be ordered in a form or amount different from what is available.  
Use proportions to calulate the right dosage.

Steps:
a. Set up proportion
b. Check to be sure units are the same horizontally
c. Cross multiply and solve for x.

Jan 5­2:03 PM

HW #3 practice problems all

3
Dosage Calculations

January 14, 2014

Example 1:
60 mg of medication are ordered.  Tablets are available which have 30 mg 
of medication in each of them.  How many tablets are needed to give 60 mg?

a) Set up as a proportion:

b) Are your units the same horizontally?
c) Cross multiply and solve.

Jan 5­2:05 PM

HW #3 practice problems all

4
Dosage Calculations

January 14, 2014

Ordered: 15 mEq
Available: 10 mEq/5cc
How many cc's needed?

Jan 5­2:10 PM

HW #3 practice problems all

5
Dosage Calculations

January 14, 2014

Ordered:  gr    1
                      800
Available: gr   1    per ml
                      200
How many ml?

Jan 5­2:12 PM

HW #3 practice problems all

6
Dosage Calculations

January 14, 2014

Ordered:  40 units
Available: 100 units/ml
How many ml's should be given?

Ordered:  3 mg
Available: 1.5 mg/tables
How many tablets should be given?

Jan 5­1:39 PM

HW #3 practice problems all

7
Dosage Calculations

January 14, 2014

Jan 14­11:14 AM

HW #3 practice problems all

8

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Dosage calculations