Parents who take their kids to the emergency room for non-urgent care aren't doing it to abuse the system.

Instead, they're doing so because they have concerns and questions about the care and attention they receive at primary care physicians' offices.

A new drug called Banzel (rufinamide) has been approved as a supplementary treatment for a severe form of epilepsy called Lennox-Gastaut syndrome, the U.S. Food and Drug Administration announced Friday.

The approval was based on results of a four-month clinical trial that included patients ages 4 to 30. Compared to patients who took a placebo, those who took the drug had 41 percent fewer tonic plus atonic seizures and 20 percent fewer seizures of any type, the agency said in a news release.

Belgian researchers have discovered that some cancer cells use lactic acid instead of sugar for food, and this might lead to new treatments that starve and kill these cells.

To survive and proliferate, all cells in the body need to produce energy. They do this by burning sugar [glucose], a process that requires oxygen. Compared with normal cells, tumor cells have restricted access to oxygen. Some tumor cells become starved for oxygen [hypoxic] and produce lactic acid. Until now, it was believed that both types of tumor cells used glucose as their main fuel, the study authors said.

Two popular medications for treating attention-deficit hyperactivity disorder (ADHD) do not cause genetic damage linked to an increased risk for developing cancer, a new study says.

The study, done by researchers at Duke University Medical Center and the National Institutes of Health, counters a previous one that reported biomarkers associated with an increased cancer risk were present in the blood of children taking the ADHD drug methylphenidate.

In experiments in mice, exercise appears to reverse the decline in the production of brain stem cells usually seen with aging, Taiwanese researchers report.

This remarkable restoration of the brain's ability to stave off aging appears to be due to exercise's ability to restore a neurochemical that is essential for the production of new brain cells.