IRVINE, Calif.--(BUSINESS WIRE)--Cortex Pharmaceuticals, Inc. (NYSE Alternext US (COR)) announced that the UK’s Medicines and Healthcare product Regulatory Agency (MHRA) gave it permission to proceed with the clinical development of CX1739 in subjects with moderate to severe sleep apnea. The study will be conducted in a UK sleep unit using a double-blind, placebo-controlled design in 20 subjects.