[Code of Federal Regulations] [Title 21, Volume 4] [Revised as of April 1, 2007] From the U.S. Government Printing Office via GPO Access [CITE: 21CFR211.87] [Page 142] TITLE 21--FOOD AND DRUGS CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) PART 211_CURRENT GOOD MANUFACTURING PRACTICE FOR FINISHED PHARMACEUTICALS-- Subpart E_Control of Components and Drug Product Containers and Closures Sec. 211.87 Retesting of approved components, drug product containers, and closures. Components, drug product containers, and closures shall be retested or reexamined, as appropriate, for identity, strength, quality, and purity and approved or rejected by the quality control unit in accordance with Sec. 211.84 as necessary, e.g., after storage for long periods or after exposure to air, heat or other conditions that might adversely affect the component, drug product container, or closure.