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2. Code of Federal Regulations Title 21, 320.1.
3. FDA. FDA Guidance for industry: bioavailability and bioequivalence studies for nasal aerosols and nasal sprays for local action. April 2003
4. US Food and Drug Administration Advisory Committee for Pharmaceutical Science: Orally Inhaled and Nasal Drug Products. 2001. http://www.fda.gov/ohrms/dockets/ac/01/slides/3764s1.htm . Accessed 14 Mar 2013
5. FDA. http://www.fda.gov/downloads/Drugs/GuidanceComplianceRegulatoryInformation/Guidances/UCM319983.pdf . Accessed 14 March 2013