Drug(Substance) usage, abuse, and addiction are on an all-time high in recent times. In many countries, people like to try it out once, even though the governments do not permit it. The usage of drugs usually starts with curiosity. The problem starts when this becomes more. Using the smallest amounts of drugs can cause very large problems. We can start by understanding the various stages.
There is no distinct way of classifying drugs although classification of drugs is very much needed to know the extent of harm it can cause to your health. The most common systems are based on parameters such as chemical constituents and effect on human behavior and health.