A fact that many people find hard to accept is that nearly all of us use mood-altering drugs. Why are some legal and others not? What is the difference between caffeine and cocaine? How much do You actually know about mood-altering drugs and what the real dangers are? This programme features a Quiz to test your knowledge. Professor Anthony Clare is in the studio with several workers from the drugs field to answer the questions and discuss why people use drugs, where the problems lie, and how we can best respond in a way that helps People avoid drug dependency.