Nicox S.A. (Euronext Paris: FR0013018124, COX), the international ophthalmic R&D company, today announced that it has received a Complete Response Letter (CRL) from the U.S. Food and Drug Administration (FDA) regarding the New Drug Application (NDA) for AC-170, its novel, proprietary, cetirizine eye drop formulation, for the treatment of ocular itching associated with allergic conjunctivitis. The FDA's stated reason for the CRL pertains solely to a Good Manufacturing Practice (GMP) inspection at a third party facility producing the active pharmaceutical ingredient (API) cetirizine and supplying it to the manufacturer of the finished product. The safety and efficacy data submitted by Nicox in the AC-170 NDA have not resulted in the FDA requesting any further clinical or non-clinical testing for the approval of the AC-170 NDA. Furthermore, the CRL did not include any concerns related to the finished product manufacturing facility.