-Prevention

reasons why you should not do drugs;
Depression: Depression can turn anyone towards drugs. Pills, marijuana and cocaine offer an escape from the sadness. If the addicted continues to use drugs, loses friends and family, he will inevitably have troubles with depression.
Mental Illness:
Even worse than a depression, which people experience
every day, is the fact that the chances for mental illness are higher for the
addicted person than for the non-addict. It could also be said the addicts are
already acting in an insane way by choosing something like cocaine over loved
ones and friends.
Physical Health: Inhaling drugs like marijuana clearly is dangerous. If done enough, it can have the same effects that smoking cigarettes can cause. Marijuana has five times as much tar as the same amount of tobacco. Injecting drugs with needles, however, can be fatal in a shorter time. Consider that every time the addict uses a needle by another addict, fatal diseases like AIDS can be spread. Every day, someone uses a dirty needle and later finds that he has contracted a serious illness. Addicts will also be less inclined to exercise or take care of themselves when all that matters is getting the next high.
Time: The last reason not to use drugs is all the time it takes to get them. Many addicts will spend the entire day just trying to get their next fix or buy the next bag of marijuana, cocaine, or other drug. They can spend hours using them. The addicts can finish little work while using, because the mind is somewhere else. Time is also wasted when you get caught with the drugs, and face jail time.
Careers: Often, before one even attempts to get a job there is a drug test. So, before the career even begins it is over. For those who already have careers, consider that drug use increases the chances of losing a job. All the work put in can be destroyed by an addiction to cocaine or marijuana. Losing a job because of drug addiction doesn't look good when you want to get the next job; references will be meaningless if the former boss says you were fired, and then tells why the worker was fired
Family: Drug addicts often think and act differently when using drugs. They will often steal from their family, and be more inclined to abuse them physically and mentally. As families are destroyed by alcoholism, illicit drug use can destroy them too.
Friends: Friends are
often more willing to work with the drug addict because they see him as someone
trying to find happiness. Where the family has to live with the addict, there is
more distance for the friend. However, even friends will leave the addicted to
his own choices, and decide to stop socializing with them. The addict, already
losing his or her family, will have lost all social friends too.
xxMarijuana
Money: Where will addicts go once they lose their job? Often, money is the major concern of addicts. Some will take to selling drugs just to get by. Either way, the user will spend most of the money they earn on more drugs. They are often willing to steal and borrow to continue using drugs. Many addicts have also turned to prostitution to pay for an addiction. They have no money left and are willing to do many things to get it.
School: Many studies report that addiction is highest for ages 18-28. A lot of these will be college students. While some like drinking a beer or two at the end of the school week, some use drugs every day. Consider that, with little money, troubles with family, and troubles with friends, the addict will often stop attending classes or doing homework. School inevitably suffers for any common drug addict.