What is a key characteristic of tamper-resistant packaging?

Tamper-resistant packaging is specifically designed to provide clear indicators that tampering has occurred, ensuring the integrity and safety of the product contained within. This characteristic is critical in the pharmaceutical industry, where the safety of medications can be compromised if tampered with. Barriers such as seals or breakable caps serve as visual cues; if these barriers are broken or altered, it is evident that the package has been opened or interfered with.

The other characteristics mentioned do not align with the purpose or definition of tamper-resistant packaging. For example, biodegradable materials are not a requirement for tamper-resistant packaging and focus more on environmental impact rather than security. Similarly, a lack of evidence when tampering occurs contradicts the very function of such packaging, which is to alert consumers and pharmacists to any potential tampering. Regular replacement of packaging every month does not pertain to tamper resistance, as the key feature involves maintaining packaging integrity rather than a schedule for replacement. Thus, the defining trait of tamper-resistant packaging lies in its ability to signal tampering through observable barriers.