Hi, Thanks for posting in HCM. I understand your concern. Ranexa contains ranolazine , which is an anti-anginal medication. It works by improving blood flow to help the heart work more efficiently. Hence, Ranexa is used to treat chronic angina. However, It is not for use during an acute (emergency) attack of angina. Kindly give the medication as has been advised by your doctor and do the necessary follow-up as suggested. Hope the information provided would be helpful. All the best.