Heroin, cocaine, LSD, ecstasy, met amphetamine are some examples of illegal drugs that are often abused. There are many reasons as to why these are considered controlled substances. First on the list is because of their deadly effects.
They are psychoactive which means that they affects the brain directly by impairing the ability to think and judge, distorting perceptions like hallucinations and illusions. These causes the users to change personality,they become irrational, impatient, irritable and unpredictable. When the addiction becomes uncontrollable, their world will revolve on how they can use that certain drug again because of the painful yearning.
Lastly, if abusing these illicit drugs won’t kill the user literally, then it will destroy families, ruin relationships and cause dreams to be broken.