Phase IV objectives may include which of the following?

• A. Should be clearly stated and may include exploratory or confirmatory characterization of safety and/or efficacy and/or assessment of pharmacokinetic parameters
• B. Only assess efficacy
• C. Only assess safety
• D. Only characterize pharmacodynamics

Answer: (C)

Phase IV trials are conducted after a drug is approved to monitor long‑term safety and real‑world risk. The central objective is ongoing safety monitoring, capturing adverse events, identifying rare or long‑term risks, and evaluating safety in broader patient populations. Because safety surveillance is the defining focus in the post‑marketing setting, an option that states the objective is to assess safety aligns best, even though some studies may also collect data on efficacy or pharmacokinetics in specific contexts. The other choices imply primary goals like efficacy or pharmacodynamics that are not the core aim of Phase IV studies.