NORTH DAKOTA (KXNET) — Marijuana, opioids, and central nervous system stimulants (CNSS) are the most used illegal drugs by teenagers in the United States. These include heroin, prescription pain ...

Each year since 1975, a survey called Monitoring the Future (MTF) has peeked into the lives of U.S. youth to see what they really think about drugs and alcohol and, more crucially, what they’re doing ...