1. Expiration dating and stability testing for human drug products. US Food and Drug Administration website. http://www.fda.gov/ICECI/Inspections/InspectionGuides/InspectionTechnicalGuides/ucm072919.htm. Accessed July 23, 2015.
2. International Conference on Harmonization. Guidance for industry Q1A(R2) stability testing of new drug substances and products. http://www.fda.gov/downloads/drugs/guidancecomplianceregulatoryinformation/guidances/ucm073369.pdf. Published November 2003. Accessed July 23, 2015.
3. SLEP: The DOD/FDA shelf life extension program. https://slep.dmsbfda.army.mil/portal/page/portal/SLEP_PAGE_GRP/SLEP_HOME_NEW. Accessed July 23, 2015.
4. Stability profiles of medication products extended beyond labeled expiration dates;Lyon;J Pharm Sci,2006
5. Stability of active ingredients in long expired prescription medications;Cantrell;Arch Intern Med,2012