Also tell your health care professional if you are allergic to any other substances, such as foods, preservatives, or dyes. Although hydralazine often is used to reduce high blood pressure in pregnant women, extensive studies of hydralazine in pregnant women have not been done. However, blood problems and other problems have been reported in infants of mothers who took hydralazine during pregnancy. These birth defects also occurred in rabbits, but did not occur in rats. Before taking this medicine, make sure your doctor knows if you are pregnant or if you may become pregnant.
Hydralazine passes into breast milk.
Although most medicines pass into breast milk in small amounts, many of them may be used safely while breast-feeding. Mothers who are taking this medicine and who wish to breast-feed should discuss this with their doctor. Although there is no specific information comparing use of hydralazine in children with use in other age groups, this medicine is not expected to cause different side effects or problems in children than it does in adults. However, the oral solution contains aspartame, which is converted to phenylalanine in the body. Children with phenylketonuria cannot process phenylalanine and high levels of this substance in body fluids may cause brain damage.