FPGEE for National Association of Boards of Pharmacy (NABP) Practice Exam 2025 - Free NABP Practice Questions and Study Guide

The primary purpose of a Closed-System Drug-Transfer Device (CSTD) is to prevent contamination from the environment. CSTDs are specifically designed to minimize the risk of exposure to hazardous drugs for healthcare professionals as well as to contain the drugs within the system, reducing the risk of spillage and environmental contamination.

This containment feature is crucial in settings where hazardous drugs are prepared or administered, such as in oncology or pharmacy compounding. By providing a closed pathway for drug transfer, CSTDs help ensure that the entire process—from the preparation to the administration of drugs—is conducted in a safer manner, thereby protecting both the healthcare workers and patients.

Regarding the other options, enhancing drug absorption, increasing the stability of drugs, and facilitating faster drug delivery are not the primary functions of CSTDs. While these factors can be important in drug administration overall, they do not align with the fundamental purpose of a CSTD, which centers on safety and contamination prevention.