Taking drug's can have a harmful effect on your body.
Here are some reasons you shouldn't take drugs, unless prescribed by a doctor:
1) Addiction. Addiction is something that millions of people suffer from, they can't stop the drug there on because, they've used it so many times.
2) Arrest. When people are on drugs, they may become agressive leading to fighting. If caught on drugs, you'll be taken to jail.
3) Aggression. When people are on drugs, they can't control their emotions. So they have sudden outbursts of aggression, which may lead to fights, and possibly jail time.
4) Overdose. Every day, more than 100 people overdose on drug's. Overdosing can be deadly if not delt with right away.