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Canadian Pharmacist Qualifying Exam Practice · Question

What is the primary goal of therapeutic drug monitoring (TDM) for medications like phenytoin or digoxin?

TDM aims to ensure drug concentrations stay within a therapeutic range, maximizing efficacy while avoiding supra-therapeutic levels that can lead to toxicity.

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Question: What is the primary goal of therapeutic drug monitoring (TDM) for medications like phenytoin or digoxin?

Answer options: ✅ Optimize drug dose and minimize toxicity

  • Determine patient adherence to therapy
  • Assess organ function
  • Identify potential drug-drug interactions

Correct answer: Optimize drug dose and minimize toxicity

Explanation: TDM aims to ensure drug concentrations stay within a therapeutic range, maximizing efficacy while avoiding supra-therapeutic levels that can lead to toxicity.

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