This document discusses the dangers of prescription drug abuse and addiction. It notes that in 2009 over 63,000 people died from drug overdoses, more than from car crashes. The three main types of addictive prescription drugs discussed are opiates, benzodiazepines, and amphetamines. Benzodiazepines are prescribed for anxiety but can cause physical dependence and withdrawal symptoms. The document also explains how tolerance and physical dependence develop, requiring users to take more and more of a drug over time just to avoid withdrawal symptoms.