1 You'll need to avoid strenuous activities, but you may be able to continue normal daily activities, such as going to work. 2  Talk to your doctor about an appropriate level of activity for you. 3  Follow a balanced diet.
Nitroglycerin works by causing your veins to expand or dilate, known as venodilation. It also works on dilating the coronary arteries, contributing to the relief of angina.
Nitroglycerin ointment is used for: Treating moderate to severe pain caused by chronic anal fissure (a tear in the skin lining the anal canal). Nitroglycerin ointment is a nitrate. It works by relaxing (widening) blood vessels.