Answer:
People use drugs for many reasons: they want to feel good, stop feeling bad, or perform better in school or at work, or they are curious because others are doing it and they want to fit in. The last reason is very common among teens.
Drugs excite the parts of the brain that make you feel good. But after you take a drug for a while, the feel-good parts of your brain get used to it. Then you need to take more of the drug to get the same good feeling. Soon, your brain and body must have the drug just to feel normal. You feel sick, awful, anxious, and irritable without the drug. You no longer have the good feelings that you had when you first used the drug. This is true if you use illegal drugs or if you misuse prescription drugs. Misuse includes taking a drug differently than how your doctor tells you to (taking more or crushing pills to "shoot up" or snort), taking someone else’s prescription, or taking it just to get “high.”
Drug use can start as a way to escape—but it can quickly make your life worse. Besides just not feeling well, different drugs can affect your brain and body in many different ways. Here are a few:
Alcohol: You might have trouble making decisions, solving problems, remembering,
and learning.
Marijuana: You might forget things you just learned or have trouble focusing.
Prescription pain relievers (opioids) or sedatives: Your heart rate and breathing
may slow to dangerous levels, leading to coma or death.
Heroin: Similar to opioid pain relievers, your heart rate and breathing may slow
to dangerous levels, leading to coma or death.
Prescription stimulants (e.g., ADHD medications): Your body temperature could
get dangerously high, or you may have an irregular heartbeat, heart failure, or seizures.
Cocaine and methamphetamine: You may get violent, have panic attacks or feel
paranoid, or have a heart attack.
MDMA (Ecstasy or Molly): You may feel confused for a long time after you take it
and have problems with attention, memory, and sleep.
LSD: Your emotions may change quickly, and you might not be able to recognize
reality; frightening flashbacks can happen long after use.
Inhalants: Your heart, kidneys, lungs, and brain may get damaged; even a healthy
person can suffer heart failure and death within minutes of sniffing a lot of an inhalant.
Many drugs can also make driving a car unsafe. Marijuana can slow reaction time, make you judge time and distance poorly, and decrease coordination (how you move your body). Cocaine and methamphetamine can make a driver aggressive and reckless. Certain kinds of sedatives, called benzodiazepines, can make you dizzy or drowsy. These effects can lead to crashes that can cause injuries and even death.