Which of the following packaging types can be returned for reuse if unopened?

Blister packs are designed to contain individual doses of medication and can often be returned for reuse if they remain unopened. The packaging typically provides a tamper-evident seal, assuring that the contents have not been compromised. Because they have not been opened, these packs are still considered safe for reuse per regulatory guidelines.

In contrast, opened bottles generally cannot be returned due to safety and contamination concerns, as once the seal is broken, there's no way to guarantee the integrity of the medication. Prescriptions from other pharmacies are specific to their own inventory and cannot be accepted for reuse at different locations. Personal medication containers, which may have been opened and might contain medications that were previously dispensed, are also typically deemed unsafe for return. Hence, unopened blister packs are uniquely positioned to qualify for reuse.