A medication must be compounded in a ____________ environment to be delivered parenterally.

Compounding medication for parenteral administration requires a sterile environment to ensure patient safety and efficacy of the treatment. Sterility is crucial because any contamination can introduce pathogens into the body, potentially leading to serious infections or other complications.

The sterile environment protects the compounded medication from microbial contamination, particulates, and other contaminants that could compromise its safety. This requirement is especially critical in settings such as hospitals or clinics where patients may be immunocompromised or otherwise vulnerable.

While other environments like controlled, temperature-regulated, or safe may be important for various aspects of drug preparation and storage, they do not specifically address the necessity for sterility that is fundamental to parenteral formulations. Thus, the need for a sterile environment is paramount in this context.