Tablet dosage calculation practice problems

Dosage calculation practice for nursing students: solve unlimited new problems below with instant checking, or work through the 15 problems with answers further down.

Unlimited new problems

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Formula to use

Tablets = desired dose ÷ dose on hand × quantity (1 tablet)

D ÷ H × Q

Open the tablet dosage (desired over have) calculator to check your own numbers step by step.

15 practice problems with answers

Solve each problem on paper first, then open the answer to compare every step.

Order: metoprolol tartrate 50 mg PO. Available: 25 mg tablets. How many tablets will you give?
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1. Desired ÷ have × quantity = 50 mg ÷ 25 mg × 1 = 2 tablets.
Answer: 2 tablets
Order: carvedilol 12.5 mg PO. Available: 6.25 mg tablets. How many tablets will you give?
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1. Desired ÷ have × quantity = 12.5 mg ÷ 6.25 mg × 1 = 2 tablets.
Answer: 2 tablets
Order: lorazepam 1 mg PO. Available: 0.5 mg tablets. How many tablets will you give?
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1. Desired ÷ have × quantity = 1 mg ÷ 0.5 mg × 1 = 2 tablets.
Answer: 2 tablets
Order: metformin 1 g PO. Available: 500 mg tablets. How many tablets will you give?
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1. Convert: 1 g = 1,000 mg.
2. Desired ÷ have × quantity = 1,000 mg ÷ 500 mg × 1 = 2 tablets.
Answer: 2 tablets
Order: furosemide 20 mg PO. Available: 40 mg scored tablets. How many tablets will you give?
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1. Desired ÷ have × quantity = 20 mg ÷ 40 mg × 1 = 0.5 tablets.
2. The tablet is scored, so a half tablet can be given.
Answer: 0.5 tablets
Order: lisinopril 20 mg PO. Available: 10 mg tablets. How many tablets will you give?
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1. Desired ÷ have × quantity = 20 mg ÷ 10 mg × 1 = 2 tablets.
Answer: 2 tablets
Order: cephalexin 500 mg PO. Available: 250 mg capsules. How many capsules will you give?
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1. Desired ÷ have × quantity = 500 mg ÷ 250 mg × 1 = 2 capsules.
Answer: 2 capsules
Order: amlodipine 10 mg PO. Available: 5 mg tablets. How many tablets will you give?
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1. Desired ÷ have × quantity = 10 mg ÷ 5 mg × 1 = 2 tablets.
Answer: 2 tablets
Order: ondansetron 8 mg PO. Available: 4 mg tablets. How many tablets will you give?
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1. Desired ÷ have × quantity = 8 mg ÷ 4 mg × 1 = 2 tablets.
Answer: 2 tablets
Order: levothyroxine 0.1 mg PO. Available: 50 mcg tablets. How many tablets will you give?
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1. Convert: 0.1 mg = 100 mcg.
2. Desired ÷ have × quantity = 100 mcg ÷ 50 mcg × 1 = 2 tablets.
Answer: 2 tablets
Order: metoprolol tartrate 25 mg PO. Available: 50 mg scored tablets. How many tablets will you give?
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1. Desired ÷ have × quantity = 25 mg ÷ 50 mg × 1 = 0.5 tablets.
2. The tablet is scored, so a half tablet can be given.
Answer: 0.5 tablets
Order: hydrochlorothiazide 12.5 mg PO. Available: 25 mg scored tablets. How many tablets will you give?
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1. Desired ÷ have × quantity = 12.5 mg ÷ 25 mg × 1 = 0.5 tablets.
2. The tablet is scored, so a half tablet can be given.
Answer: 0.5 tablets
Order: digoxin 0.25 mg PO. Available: 0.125 mg tablets. How many tablets will you give?
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1. Desired ÷ have × quantity = 0.25 mg ÷ 0.125 mg × 1 = 2 tablets.
Answer: 2 tablets
Order: chewable aspirin 324 mg PO. Available: 81 mg tablets. How many tablets will you give?
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1. Desired ÷ have × quantity = 324 mg ÷ 81 mg × 1 = 4 tablets.
Answer: 4 tablets
Order: digoxin 0.25 mg PO. Available: 125 mcg tablets. How many tablets will you give?
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1. Convert: 0.25 mg = 250 mcg.
2. Desired ÷ have × quantity = 250 mcg ÷ 125 mcg × 1 = 2 tablets.
Answer: 2 tablets