In a letter Saturday, the New York Democrat asked the Food and Drug Administration to investigate the use of caffeine in inhalable food products such as so-called Coco Loko. It's gotten buzz in recent weeks.

Schumer, the Senate minority leader, says there are too many unanswered questions about a product pitched under the innocent-sounding name of chocolate.

"This suspect product has no clear health value," he said in a statement. "I can't think of a single parent who thinks it is a good idea for their children to be snorting over-the-counter stimulants up their noses."