3. Dosage Calculations January 06, 2012
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.
Nurse Wkst 3
4. Dosage Calculations January 06, 2012
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.
Nurse Wkst 4
5. Dosage Calculations January 06, 2012
Ordered: 15 mEq
Available: 10 mEq/5cc
How many cc's needed?
Nurse Wkst 5
6. Dosage Calculations January 06, 2012
Ordered: gr 1
800
Available: gr 1 per ml
200
How many ml?
Nurse Wkst 6
7. Dosage Calculations January 06, 2012
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?
Nurse Wkst 7
