A patch developed to treat attention deficit hyperactivity disorder in children received a negative review from a Food and Drug Administration scientist, who concluded the drug cannot be safely marketed.

The patch uses methylphenidate, the same drug that is in Ritalin. But FDA reviewer Dr. Robert Levin found the patch produces troubling side effects too often to be considered safe. His findings were in briefing documents released by the agency on Thursday in advance of a public meeting on the drug. (Washington Post)