About 1 percent of the population is addicted to a drug that gives them headaches if they quit, and may cause jitters, anxiety, insomnia, and ulcers if they dont. It’s lethal at high doses. About 90 percent of the US population takes this drug regularly, even though it has no medical use. Its marketed to kids, sold in or near schools, and is on school playgrounds. A schedule 1 narcotic, you assume?