More than half of adults and 44 percent of children who were drug-tested by a national clinical laboratory last year misused their prescription medications, according to a study released Monday by Quest Diagnostics.
Misuse of medications can mean that patients were either taking too much, too little or none of their medications. It also can mean test results showed they were using other drugs that had not been prescribed, including illicit drugs -- as 45 percent of adults were doing, the study found.