ADC Practice Question — Techniques and complications

What is the maximum safe dose of prilocaine 3% for this 75kg patient?

Pharmacology questions in the ADC written exam test applied prescribing decisions, not rote recall of drug names. This exam-level vignette tests your ability to work through clinical details and arrive at the correct management.

Dimitrios Papadopoulos, a 61-year-old Greek-Australian man, presents to your dental practice for multiple posterior restorations. He has a history of unstable angina (recent chest pain episodes), type 2 diabetes mellitus, and glucose-6-phosphate dehydrogenase (G6PD) deficiency. His medications include metformin, aspirin, and sublingual GTN. He weighs 75kg. You plan extensive treatment requiring significant local anaesthesia. His cardiologist has advised avoiding adrenaline-containing preparations due to his cardiac condition. What is the maximum safe dose of prilocaine 3% for this 75kg patient?

A. 675mg (22.5mL)
B. 600mg (20mL)
C. 300mg (10mL)
D. 450mg (15mL)
E. 525mg (17.5mL)

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Sources cited

Therapeutic Guidelines v4 Odell's 3rd & 4th Ed IADT 2020 Code of Conduct CMS (Evans) Infection Control + more

Show the answer and cited explanation

Correct answer: A

According to TG Table 13.9, maximum mg/kg dose of prilocaine 3% is 9mg/kg. For 75kg: 75 × 9 = 675mg. Converting to volume: 675mg ÷ 30mg/mL = 22.5mL.

Source: Ch 8: Maximum safe doses

Remy's study tip — For pharmacology vignettes, read the patient’s medical history and allergies BEFORE looking at the drug options.

Exam preparation FAQ

Should I memorise guidelines word-for-word for Techniques and complications?

Focus on decision points — when the guideline says X vs Y. The exam tests application, not recitation.

How are Techniques and complications questions structured in the ADC written exam?

ADC Techniques and complications questions present as clinical vignettes requiring management decisions. The correct answer is always traceable to a guideline source.

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