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High-risk decimal dose — GPhC CRA MCQ

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ModerateDispensing and SupplyHigh-risk decimal doseGPhC CRA

A prescription for digoxin oral solution is received with a dose written as .125 mg daily. The prescriber is contactable and the patient is newly started. What is the legal classification/requirement?

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Correct answer: D — Clarify the dose and ensure the label avoids unsafe decimal notation

Decimals without a leading zero are a known source of dosing error. Digoxin has a narrow therapeutic index, so dose clarity is essential. The pharmacist should confirm the intended dose and label it using safe notation, such as 0.125 mg where appropriate. Guessing or rounding could cause serious toxicity.

Reference: BNF; GPhC Standards