Vasodilators increase the size of blood vessels.
Nylidrin is used to treat problems due to poor blood circulation. In deciding to use a medicine, the risks of taking the medicine must be weighed against the good it will do. This is a decision you and your doctor will make. Also tell your health care professional if you are allergic to any other substances, such as foods, preservatives, or dyes. It is not known whether nylidrin passes into breast milk.