A drug is a substance taken into the body that modifies or affects chemical reactions in the body. Some drugs are beneficial, while others are harmful.
|Type of drug||Effect on body||Example|
|Depressant||Slows down nerve and brain activity||Alcohol, solvents, temazepam|
|Hallucinogen||Alters what we see and hear||LSD|
|Painkiller||Blocks nerve impulses||Aspirin, paracetamol|
|Performance enhancer||Improves muscle development||Anabolic steroids|
|Stimulant||Increases nerve and brain activity||Nicotine, caffeine, ecstasy|
Some drugs are illegal, or must only be prescribed by a doctor. Some prescription drugs are misused and taken for recreational use, rather than for medical reasons. They become illegal under these circumstances.
Illegal drugs are classified from Class A to Class C. Class A drugs are the most dangerous, with the most serious penalties for possession or dealing. Class C are the least dangerous, with the lightest penalties, but this does not mean they are safe to use.