PracticeTestVault review illustration for Dosage Calculations on PTCB Certified Pharmacy Technician (CPhT) Review: Dosage Calculations

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PTCB Certified Pharmacy Technician (CPhT) Review: Dosage Calculations

Review dosage calculations for this PTCB Certified Pharmacy Technician (CPhT) question with the key prompt clue, correct-answer reasoning, distractor checks, and sources to verify next.

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This question-specific review guide is tied to the answer reasoning for a PracticeTestVault item. Use it after you answer the question so the review stays focused on what the prompt actually tested.

What this question is testing

Objective: Dosage Calculations

Prompt focus: A physician orders amoxicillin oral suspension 250 mg three times daily for 10 days. The suspension is available as 125 mg per 5 mL. How many milliliters should the patient receive per dose?

Why the correct answer works

10 mL

250 mg divided by 25 mg per mL equals 10 mL per dose.

Why the tempting wrong answer fails

The tempting wrong answer usually loses because it skips the key condition, priority, or evidence in the prompt.

Plain-language takeaway

Using ratio and proportion, 125 mg per 5 mL means each milliliter contains 25 mg. To deliver 250 mg, divide 250 mg by 25 mg per mL, which equals 10 mL per dose.

Simple analogy

Think of dosage calculations like following a short checklist: identify the clue, confirm the rule, and then make the move that fits this exact scenario.

How to review it before a retake

  • Underline the command word and name what the question is asking before rereading the choices.
  • Compare the correct answer against the closest distractor and write the exact detail that separates them.
  • Retest this objective with a fresh question without looking at the rationale first.

Sources to verify next