Intermediate 1 Biology
Unit 1 – Health and Technology
Humans have used drugs of one sort or another for thousands of years
-wine was used at least from the time of the early Egyptians
-narcotics from 4000 BC
-medicinal use of marijuana has been dated to 2737BC in China
Drugs that act on the central nervous
system and increase brain activity.
Some give feelings of alertness, greater
energy and confidence.
They may also reduce appetite
Alkyl Nitrites e.g. poppers
Types of Drugs-Depressants
Drugs that act on the central nervous system and slow down brain activity.
Impaired co-ordination, balance and judgement are common.
Higher doses can lead progressively to drowsiness, vomiting, coma and even death.
Volatile substances or sniffable substances (eg glues, gases, aerosols)
GHB (Gamma hydroxy-butyrate)
Drugs that act to change the way users experience the world through the five senses.
Sometimes this involves seeing, and hearing things which aren't there.
Examples of Hallucinogens
Drugs that have a painkilling effect.
Types of Drugs – Anabolic Steroids
Drugs that promote muscle growth and increase lean body mass.
These drugs mostly have legitimate medical uses
They are often misused by those wishing to enhance their athletic performance or strength.
The following statistics are from the results of a major national survey of secondary schoolchildren aged 11-15 published by the Department of Health (DH) in 2002.