This application note discusses crucial aspects of packaging design for medical devices and pharmaceuticals, highlighting the importance of material selection and thorough testing to ensure compliance with regulatory standards. Key considerations include barrier properties against oxygen, moisture, and light, as well as sterilization compatibility, biocompatibility, and user interface. Ethylene vinyl alcohol (EVOH) is noted for its excellent oxygen barrier properties, although it requires multi-layer packaging to address moisture sensitivity. The note outlines various testing methods, such as FTIR and DSC, to analyze packaging materials and ensure they meet sterilization requirements. Additionally, it underscores the significance of accelerated aging methods to predict shelf life and maintain packaging integrity.