The most commonly used nitrate is glycerine trinitrate . This is a potent arterial dilator that has its most beneficial effect on the arteries supplying the heart muscle. It is commonly used in angina and, like any cardiac drug, should be used as instructed unless alternatives can be found.

Like any drug that affects the cardiovascular system it has side effects, including dizziness, headaches and nausea, and any such symptoms should be discussed with your GP.