Examples · Oral dose — tablets
Worked example
Oral dose — tablets — practice problem 8
The prescriber orders 200 mg of digoxin PO. The pharmacy stocks digoxin in 100 mg tablets.
Ordered dose200 mg
On hand100 mg per tablet
How many tablets should the nurse give?
Answer: 2 tablets
Step-by-step solution
1. Identify what you have and what you want
Have: 100 mg per tablet · Want: 200 mg
2. Set up dimensional analysis so mg cancels
200 mg × ( 1 tablet ÷ 100 mg )
3. Cancel mg and solve
= ( 200 × 1 ) ÷ 100 tablet
= 2 tablets
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