There may be an association between the use of stimulant medications for attention-deficit hyperactivity disorder, known as ADHD, and sudden cardiac death in healthy children, according to a study published in the American Journal of Psychiatry. But the U.S. Food and Drug Administration says that, because of the study"s limitations, parents should not stop a child"s stimulant medication based on the study. The FDA recommends that parents should discuss concerns about the use of these medications with the prescribing health care professional.