Stimulants used to treat attention deficit hyperactivity disorder do not increase the risk of heart attacks, strokes or sudden death, U.S. researchers said on Monday, in a finding that should reassure millions of parents whose children take the drugs. Researchers studied the medical records of more than 1 million children and young adults aged 2 to 24 who were taking or had taken stimulants such as Ritalin or Adderall and found no sign of increased risk of heart problems.
