Download Chapter 5 Drugs - Madison Public Schools

Chapter 5 Drugs
Drug dependence &
Types of Drugs
Drug Dependence & Types of Drugs
Objectives:
1. Students will be able to compare and
contrast psychological and physical
dependence.
2. Students will be able to name and
classify the commonly abused drugs.
Introduction
What is a drug?

A natural or synthetic substance that is
used to produce physiological or
psychological effects.
Importance to forensic science?

75% of evidence evaluated by crime labs
is drug related.
Drug Dependence
Factors affecting drug dependence include:

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Nature of the drug
Route of administration
Dose
Frequency of administration
An individual’s rate of metabolism
Drug Dependence
Non-drug factors affecting drug dependence
include:

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Personality of the user
Expectations about drug use
Society’s attitudes and possible responses
Setting in which the drug is used
Drug dependence
Psychological dependence:
The conditioned use of a drug caused by
underlying emotional needs
Physical dependence:
Physiological need for a drug brought about
by its regular use and characterized by
withdrawal sickness when administration
of the drug is abruptly stopped.
Types of Drugs

Narcotic – a drug that induces sleep and
depresses vital body functions such as
blood pressure, pulse rate, and breathing
rate
Includes:
Opiates-morphine, heroin, codeine
Synthetic opiates-methadone, oxy-contin
Analgesics- substances that decrease pain.
Types of Drugs

Hallucinogen-a substance that induces
changes in normal thought processes,
perceptions, and moods
Includes:
Marijuana, LSD, PCP
Types of Drugs

Depressant-a substance that slows down, or
depresses, the functions of the central nervous
system
Includes:
Alcohol
Barbiturates (“Barbitals”, Quaalude)
Anti-psychotic/anti-anxiety drugs (Miltown,
Librium, Valium)
Inhaled volatile substances (glue, gasoline, etc.)
Types of Drugs

Stimulant-a substance that speeds up, or
stimulates, the central nervous system
Includes:
Amphetamines/methamphetamines
Cocaine/Crack
Types of Drugs

Club drugs-synthetic drugs often used at
clubs, bars, etc.
Includes:
MDMA (Ecstasy)
GHB (gamma-hydroxybutyrate)
Rohypnol (“Roofie”)
Ketamine
Methamphetamine
Types of Drugs

Anabolic Steroids-synthetic compounds
chemically related to the male sex
hormone testosterone that are used to
promote muscle growth