A client presents to the healthcare setting with a diagnosis of chronic liver failure. The nurse understands this will affect which step of pharmacokinetics?

The correct answer is B: Metabolism. In chronic liver failure, there is impairment in the liver's ability to metabolize drugs, affecting their breakdown and elimination from the body. This leads to potential drug toxicity as the drugs may accumulate in the body. Absorption (Choice C) involves the drug's entry into the bloodstream, which is not directly impacted by liver failure. Empiric (Choice A) refers to using clinical experience instead of scientific evidence, which is not related to liver failure. Efficacy (Choice D) is about the drug's effectiveness, not its metabolism.