What must be done when a drug is confirmed to be adulterated?

When a drug is confirmed to be adulterated, the appropriate action is to quarantine the product and clearly mark it to prevent any further distribution or use. This is crucial because adulterated drugs may pose safety risks and do not meet quality standards, potentially causing harm to patients. Quarantine ensures that the drug is isolated from other products and prevents accidental dispensing or use.

Clearly marking the adulterated product provides essential information to all staff members who might encounter the item, reinforcing that it is not safe for use or sale. This practice is not just about compliance with regulations but also about protecting public health and maintaining the integrity of the pharmacy operation.

While other options may seem viable in different contexts—such as returning the drug to the manufacturer—quarantining and marking it ensures immediate action to safeguard consumers. This approach adheres to the ethical and legal obligations of pharmacists regarding drug safety and quality.