A large study suggests that people with serious attention deficit hyperactivity disorder are less likely to commit crimes when taking medication.
The study, published in , examined records of 25,000 people in Sweden to see if those with ADHD had fewer criminal convictions when taking medication than when they were not.
Of 8,000 people whose medication use fluctuated over a three-year period, men were 32 per cent less likely and women were 41 per cent less likely to have criminal convictions while on medication. Patients were primarily young adults, many with a history of being admitted to hospital. Crimes included assault, drug offences and homicide as well as less serious crimes. Medication varied, but many took stimulants like Ritalin.
"The study adds a lot," said Dr Gabrielle Carlson, director of child and adolescent psychiatry at Stony Brook University medical school, who was not involved in the study. "Cutting the crime rate, that's not trivial. Maybe it will get some help for people in jail. It gives people who were on the fence maybe a little more confidence in this treatment."
Studies suggest that people with ADHD are more likely to commit crimes. And while people, especially boys, are often prescribed medication as children, they often resist taking it as teenagers. Studies have not shown that medication has long-term effects on symptoms.
Dr Paul Lichtenstein, a study author and a professor at Karolinska Institute, cautioned against concluding that everyone with ADHD should be continuously medicated.
