Answer:Methamphetamine , also commonly as crystal
Step-by-step explanation:
This is a drug that is mostly used as a stimulant and is very addictive because it produces a chemical known as dopamine which increases the craving and the need to want to take more of this drug.
The reason people get addicted is also because it quickly vanishes in your body(which means that stimulant effect quickly goes away) after you have taken it which makes someone want to take it more frequently in just a short span of time .
It has many side effect as most excessive drug taking does , these side effect are
It affect the way you breath , it also increase your blood pressure .