Examples · Oral dose - liquid
Worked example
Oral dose - liquid - practice problem 1
The prescriber orders 8 mg of ondansetron oral solution. The bottle is labeled 4 mg per 5 mL.
Ordered dose8 mg
Concentration4 mg per 5 mL
How many milliliters should the nurse give?
Answer: 10 mL
Step-by-step solution
1. Identify what you have and what you want
Have: 4 mg per 5 mL · Want: 8 mg
2. Set up dimensional analysis so mg cancels
8 mg × ( 5 mL ÷ 4 mg )
3. Cancel mg and solve
= ( 8 × 5 ) ÷ 4 mL
= 10 mL
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