The document discusses the selection and evaluation of pharmaceutical packaging materials. It describes the key factors to consider when selecting packaging, including the drug properties, intended use conditions, and potential interactions. The main packaging materials discussed are glass, plastic, rubber, and metal. Glass types I-IV are outlined based on their chemical resistance. Compatibility tests for packaging include water attack testing of glass and evaluation of plastic containers for leakage, water permeability, and collapsability. Rubber closure testing involves sterility, residue levels, penetrability, and self-sealability. Proper packaging selection and evaluation helps ensure the drug product remains safe, stable and effective throughout its shelf life.