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 is usually taken at the first sign of chest pain. Try to rest or stay seated when you take nitroglycerin (may cause dizziness or fainting). You may use nitroglycerin sublingual within 5 to 10 minutes before an activity you think might cause chest pain. Follow your doctor's instructions.