Medication maths: estimations of kidney function

This article is part of a comprehensive series on pharmaceutical calculations in preparation for the General Pharmaceutical Council (GPhC) registration assessment, providing guidance on how to tackle questions related to kidney function, including a worked example of a sample exam question.

By the end of this article, you should be able to:

  • Systematically work through kidney function calculations and be able to use the Cockroft and Gault formula to estimate creatine clearance;
  • Understand whether ideal body weight or actual body weight should be used within the calculation;
  • Understand the importance of units and rounding when solving calculations.

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