CV Therapeutics has received approval from  U.S. Food and Drug Administration (FDA) for new language for the product labeling for Ranexa (ranolazine extended-release tablets) which describes the ability of ranolazine to inhibit the late sodium current at therapeutic levels.

Ranexa is currently indicated for the treatment of chronic angina in patients who have not achieved an adequate response with other antianginal drugs, and should be used in combination with amlodipine, beta-blockers or nitrates.

Published data on ranolazine's mechanism suggests that during ischemic episodes excess sodium can flow into cardiac cells through sodium channels. This excess sodium can trigger a subsequent overload of calcium that can lead to problems with proper contraction and relaxation of the heart. Late sodium current inhibition has been shown to improve mechanical and electrical dysfunctions of cardiac cells under these circumstances.

CV Therapeutics, Inc., headquartered in Palo Alto, California, is a biopharmaceutical company focused on applying molecular cardiology to the discovery, development and commercialization of novel, small molecule drugs for the treatment of cardiovascular diseases.  CV Therapeutics' approved product, Ranexa (ranolazine extended-release tablets), is indicated for the treatment of chronic angina in patients who have not achieved an adequate response with other antianginal drugs, and should be used in combination with amlodipine, beta-blockers or nitrates.