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Drug Dependence and Different Types of Drugs

Learn about drug dependence, psychological and physical aspects, and the classification of commonly abused drugs. Explore various drug types like narcotics, hallucinogens, depressants, stimulants, club drugs, and anabolic steroids.

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Drug Dependence and Different Types of Drugs

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  1. Chapter 5 Drugs Drug dependence & Types of Drugs

  2. Drug Dependence & Types of Drugs Objectives: • Students will be able to compare and contrast psychological and physical dependence. • Students will be able to name and classify the commonly abused drugs.

  3. 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.

  4. Drug Dependence Factors affecting drug dependence include: • Nature of the drug • Route of administration • Dose • Frequency of administration • An individual’s rate of metabolism

  5. Drug Dependence Non-drug factors affecting drug dependence include: • Personality of the user • Expectations about drug use • Society’s attitudes and possible responses • Setting in which the drug is used

  6. 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.

  7. 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.

  8. Types of Drugs • Hallucinogen-a substance that induces changes in normal thought processes, perceptions, and moods Includes: Marijuana, LSD, PCP

  9. 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.)

  10. Types of Drugs • Stimulant-a substance that speeds up, or stimulates, the central nervous system Includes: Amphetamines/methamphetamines Cocaine/Crack

  11. Types of Drugs • Club drugs-synthetic drugs often used at clubs, bars, etc. Includes: MDMA (Ecstasy) GHB (gamma-hydroxybutyrate) Rohypnol (“Roofie”) Ketamine Methamphetamine

  12. Types of Drugs • Anabolic Steroids-synthetic compounds chemically related to the male sex hormone testosterone that are used to promote muscle growth

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