Psychoactive drugs may be divided into four categories:
- Depressants: Drugs that decrease alertness by slowing down the activity of the central nervous system (e.g. heroin, alcohol and analgesics).
- Stimulants: Drugs that increase the body's state of arousal by increasing the activity of the brain (e.g. caffeine, nicotine, amphetamines and cocaine).
- Hallucinogens: Drugs that alter perception and can cause hallucinations, such as seeing or hearing something that is not there (e.g. LSD and 'magic mushrooms').
- Other: Some drugs fall into the 'other' category, as they may have properties of more than one of the above categories (e.g. cannabis has depressive, hallucinogenic and some stimulant properties).
Get the Facts on Cannabis
Find out about the impact Cannabis can have on your physical health and mental health here.