FDA-imposed dosing limits are preventing Cortex Pharmaceuticals Inc. from more broadly studying CX717 in humans for now, causing the company's stock to lose more than a third of its value Friday, although the agency lifted a seven-month clinical hold on the drug in the process. (BioWorld Today)

FDA-imposed dosing limits are preventing Cortex Pharmaceuticals Inc. from more broadly studying CX717 in humans for now, causing the company's stock to lose more than a third of its value Friday, although the agency lifted a seven-month clinical hold on the drug in the process. (BioWorld Today)