Renal PK Study Guidance

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FDA has published a guidance, Pharmacokinetics in Patients with Impaired Renal Function — Study Design, Data Analysis, and Impact on Dosing, to assist sponsors in designing and analyzing studies assessing the influence of impaired renal function on the pharmacokinetics (PK) and/or pharmacodynamics of an investigational drug. The document also provides recommendations on determining the recommended dosage in patients with impaired renal function and addresses how such information can inform the labeling, including:

  • when a standalone study to address a drug’s PK in participants with impaired renal function is recommended and when it may not be warranted
  • the design and conduct of PK studies in participants with impaired renal function;
  • considerations for characterizing a drug’s PK in patients receiving intermittent or continuous renal replacement therapies;
  • using information from Phase 2 and 3 studies to characterize the impact of renal function on PK and/or drug effects in patients with impaired renal function;
  • considerations for deriving dosage recommendations for patients with impaired renal function; and
  • analysis and reporting of study results that characterize the impact of impaired renal function and how these data inform dosing recommendations in labeling.

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