What must be included in the written policies for distributors regarding drug products?

The correct answer emphasizes the practice of first-in, first-out (FIFO) inventory management, which is crucial in the distribution of drug products. Including a policy that mandates the oldest approved stock to be distributed first ensures that products are used within their shelf lives, helping to minimize waste and ensuring patient safety. This practice prevents the distribution of outdated or expired medications, which is vital for maintaining public health standards and regulatory compliance.

Options discussing random selection or the exclusivity of distributing only new products do not promote efficient inventory management and could lead to increased waste or the potential distribution of expired products. Similarly, distributing based solely on demand could result in older stock being overlooked if demand spikes for newer products. Therefore, establishing a policy that prioritizes the distribution of the oldest stock directly addresses concerns about product efficacy and safety, aligning with best practices in pharmaceutical distribution.