- Section 1 The Subject Matter of and Approach to Psychiatry
- 1.3 Psychiatry as a worldwide public health problem
- 1.4 The history of psychiatry as a medical specialty
- 1.5 Ethics and values
- 1.6 The psychiatrist as a manager
- 1.7 Descriptive phenomenology
- 1.8 Assessment
- 1.9 Diagnosis and classification
- 1.10 From science to practice
- Section 2 The Scientific Basis of Psychiatric Aetiology
- 2.3 The contribution of neurosciences
- 2.4 The contribution of genetics
- 2.5 The contribution of psychological science
- 2.6 The contribution of social sciences
- 2.7 The contribution of epidemiology to psychiatric aetiology
- Section 3 Psychodynamic Contributions to Psychiatry
- Section 4 Clinical Syndromes of Adult Psychiatry
- 4.1 Delirium, dementia, amnesia, and other cognitive disorders
- 4.2 Substance use disorders
- 4.2.1 Pharmacological and psychological aspects of drugs abuse
- 4.2.2 Alcohol use disorders
- 4.2.3 Other substance use disorders
- 4.2.3.1 Opioids: heroin, methadone, and buprenorphine
- 4.2.3.2 Disorders relating to the use of amphetamine and cocaine
- 4.2.3.3 Disorders relating to use of PCP and hallucinogens
- 4.2.3.4 Misuse of benzodiazepines
- 4.2.3.5 Disorders relating to the use of ecstasy and other ‘party drugs’
- 4.2.3.6 Disorders relating to the use of volatile substances
- 4.2.3.7 The mental health effects of cannabis use
- 4.2.3.8 Nicotine dependence and treatment
- 4.2.4 Assessing need and organizing services for drug misuse problems
- 4.3 Schizophrenia and acute transient psychotic disorders
- 4.3.6 Aetiology
- 4.3.7 Course and outcome of schizophrenia and their prediction
- 4.3.8 Treatment and management of schizophrenia
- 4.3.9 Schizoaffective and schizotypal disorders
- 4.3.10 Acute and transient psychotic disorders
- 4.4 Persistent delusional symptoms and disorders
- 4.5 Mood disorders
- 4.6 Stress-related and adjustment disorders
- 4.7 Anxiety disorders
- Section 5 Psychiatry and Medicine
- Section 6 Treatment Methods in Psychiatry
- 6.2 Somatic treatments
- Section 7 Social Psychiatry and Service Provision
- Section 8 The Psychiatry of Old Age
- Section 9 Child and Adolescent Psychiatry
(p. 507) The mental health effects of cannabis use
- Chapter:
- (p. 507) The mental health effects of cannabis use
- Author(s):
Wayne Hall
- DOI:
- 10.1093/med/9780199696758.003.0068
The major adverse acute psychological effects of cannabis use are as follows: ♦ Anxiety, dysphoria, panic, and paranoia, especially in naive users ♦ Impairment of attention, memory, and psychomotor performance while intoxicated ♦ An increased risk of accident if an intoxicated person attempts to drive a vehicle. The major psychological effects of daily heavy cannabis use over many years remain contested but probably include the following: ♦ A cannabis-dependence syndrome ♦ Subtle forms of cognitive impairment that affect attention and memory and which persist while the user remains chronically intoxicated ♦ Impaired educational achievement in adolescents with a history of poor school performance, whose achievement may be limited by the cognitive impairments produced by chronic intoxication with cannabis ♦ Among those who initiate cannabis use in the early teens, a higher risk of progressing to heavy cannabis and other illicit drug use, and becoming dependent on cannabis.
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- Section 1 The Subject Matter of and Approach to Psychiatry
- 1.3 Psychiatry as a worldwide public health problem
- 1.4 The history of psychiatry as a medical specialty
- 1.5 Ethics and values
- 1.6 The psychiatrist as a manager
- 1.7 Descriptive phenomenology
- 1.8 Assessment
- 1.9 Diagnosis and classification
- 1.10 From science to practice
- Section 2 The Scientific Basis of Psychiatric Aetiology
- 2.3 The contribution of neurosciences
- 2.4 The contribution of genetics
- 2.5 The contribution of psychological science
- 2.6 The contribution of social sciences
- 2.7 The contribution of epidemiology to psychiatric aetiology
- Section 3 Psychodynamic Contributions to Psychiatry
- Section 4 Clinical Syndromes of Adult Psychiatry
- 4.1 Delirium, dementia, amnesia, and other cognitive disorders
- 4.2 Substance use disorders
- 4.2.1 Pharmacological and psychological aspects of drugs abuse
- 4.2.2 Alcohol use disorders
- 4.2.3 Other substance use disorders
- 4.2.3.1 Opioids: heroin, methadone, and buprenorphine
- 4.2.3.2 Disorders relating to the use of amphetamine and cocaine
- 4.2.3.3 Disorders relating to use of PCP and hallucinogens
- 4.2.3.4 Misuse of benzodiazepines
- 4.2.3.5 Disorders relating to the use of ecstasy and other ‘party drugs’
- 4.2.3.6 Disorders relating to the use of volatile substances
- 4.2.3.7 The mental health effects of cannabis use
- 4.2.3.8 Nicotine dependence and treatment
- 4.2.4 Assessing need and organizing services for drug misuse problems
- 4.3 Schizophrenia and acute transient psychotic disorders
- 4.3.6 Aetiology
- 4.3.7 Course and outcome of schizophrenia and their prediction
- 4.3.8 Treatment and management of schizophrenia
- 4.3.9 Schizoaffective and schizotypal disorders
- 4.3.10 Acute and transient psychotic disorders
- 4.4 Persistent delusional symptoms and disorders
- 4.5 Mood disorders
- 4.6 Stress-related and adjustment disorders
- 4.7 Anxiety disorders
- Section 5 Psychiatry and Medicine
- Section 6 Treatment Methods in Psychiatry
- 6.2 Somatic treatments
- Section 7 Social Psychiatry and Service Provision
- Section 8 The Psychiatry of Old Age
- Section 9 Child and Adolescent Psychiatry