Examples · Oral dose — tablets
Worked example
Oral dose — tablets — practice problem 13
The prescriber orders 3.75 mg of prednisone PO. The pharmacy stocks prednisone in 2.5 mg tablets.
Ordered dose3.75 mg
On hand2.5 mg per tablet
How many tablets should the nurse give?
Answer: 1.5 tablets
Step-by-step solution
1. Identify what you have and what you want
Have: 2.5 mg per tablet · Want: 3.75 mg
2. Set up dimensional analysis so mg cancels
3.75 mg × ( 1 tablet ÷ 2.5 mg )
3. Cancel mg and solve
= ( 3.75 × 1 ) ÷ 2.5 tablet
= 1.5 tablets
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