GTN Sorbitrate -CR 6.4 Tablet 30's is used to treat and prevent chest pain caused by the heart. When the heart muscle does not receive enough blood, angina develops. To allow for easier blood flow to the heart, this medication relaxes and widens blood vessels. The dose and duration of GTN Sorbitrate -CR 6.4 Tablet 30's should be followed as prescribed by your doctor. It can be taken with or without food, preferably at the same time every day. Avoid exceeding the specified dose since your body may suffer negative consequences. Over time, this medication can cause you to become less responsive to the same dose due to tolerance. To stop this from happening, you must adhere to a very strict dose regimen.Disclaimer : For More Details, Contact Your Physician