His latest target: medicines like Ritalin, Concerta and Adderall, used to treat ADHD.

FORBES: Cardiac Critic

The most commonly used medications are the stimulants, like Ritalin or Adderall, or their long-acting equivalents, like Concerta, Ritalin LA, or Adderall XR.

NPR: Excerpt: 'Delivered from Distraction'

On Feb. 10, a panel of drug safety experts unexpectedly recommended that the U.S. Food and Drug Administration put a visible, boxed warning on stimulant medicines like Adderall, Ritalin and Concerta, which are used to treat the disorder in both children and adults.

FORBES: Pay Attention

In a perspective published online Monday night in The New England Journal of Medicine, Nissen lays out his case that drugs such as Ritalin, Concerta and Adderall may cause potential risks to the heart that many patients don't appreciate--and that these risks should be spelled out in a clear, black-box warning for consumers.

FORBES: Magazine Article