Substance-induced psychosis | |
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Other names | Substance-induced psychotic disorder, drug-induced psychosis, substance/medication-induced psychotic disorder, toxic psychosis |
Specialty | Psychiatry, addiction psychiatry |
Substance-induced psychosis (commonly known as toxic psychosis or drug-induced psychosis) is a form of psychosis that is attributed to substance intoxication, withdrawal or recent consumption of psychoactive drugs. It is a psychosis that results from the effects of various substances, such as medicinal and nonmedicinal substances, legal and illegal drugs, chemicals, and plants. Various psychoactive substances have been implicated in causing or worsening psychosis in users. [1]
Psychosis manifests as disorientation, visual hallucinations and/or haptic hallucinations. [2] It is a state in which a person's mental capacity to recognize reality, communicate, and relate to others is impaired, thus interfering with the capacity to deal with life's demands. [3] While there are many types of psychosis, the cause of substance-induced psychosis can be pinpointed to intake of specific chemicals. To properly diagnose Substance-Induced Psychotic Disorder, one must conclude that exhibited hallucinations or delusions began during intoxication, withdrawal, or within a month after use of the substance and the symptoms are not related to a non-substance-induced psychotic disorder. [4]
Because substance-induced psychosis results from the consumption of a substance or combination of substances, treatment practices heavily rely on detoxification and discontinuation of the substance(s). [1] Detox and addiction treatment centers may often provide rehabilitation programs, including inpatient and outpatient treatment options, support groups, and extended treatment plans. Substance-induced psychosis may persist for hours, days, or weeks, but typically resolves within a month of sobriety. [1] Treating psychosis involves a very thorough evaluation, including medical history, family background, symptoms, and other potential causes. [5] Treatment prioritizes emergent symptoms, evaluates for underlying mental illnesses, and focuses on behavioral and preventative measures against substance use. [1]
Rates of drug use amongst people with schizophrenia are higher than the general population; 50% of those diagnosed with schizophrenia use substances over their life. [6] : 495, 496 There is a model that suggests this arises because those with schizophrenia self-medicate with psychoactive drugs. [6] : 500
A 2019 systematic review and meta-analysis found that 25% (18–38%) of people diagnosed with substance-induced psychosis went on to be diagnosed with schizophrenia, compared with 36% (30–43%) for brief, atypical and not otherwise specified psychoses. [7] The substance present was the primary predictor of transition from drug-induced psychosis to schizophrenia, with highest rates associated with cannabis (34% (25–46%)), hallucinogens (26% (14–43%)) and amphetamines (22% (14–34%)). Lower rates were reported for opioid– (12% (8–18%)), alcohol– (9% (6–15%)) and sedative– (10% (7–15%)) induced psychoses. Transition rates were slightly lower in older cohorts but were not affected by sex, country of the study, hospital or community location, urban or rural setting, diagnostic methods, or duration of follow-up. [7]
Class of substance | Number of studies | Rates of transition to schizophrenia | ||
---|---|---|---|---|
Estimate | Lower bound | Upper bound | ||
Brief, atypical and NOS | 34 | 36% | 30% | 43% |
Combined | - | 25% | 18% | 38% |
Cannabis | 6 | 34% | 25% | 46% |
Hallucinogens | 3 | 26% | 14% | 43% |
Amphetamines | 5 | 22% | 14% | 34% |
Opioid | 3 | 12% | 8% | 18% |
Sedative | 3 | 10% | 7% | 15% |
Alcohol | 9 | 9% | 6% | 15% |
Psychotic states may occur after using a variety of legal and illegal substances. Substances whose use or withdrawal is implicated in psychosis include the following:
Psychoactive substance-induced psychotic disorders outlined within the ICD-10 codes F10.5—F19.5:
F17.5 is reserved for tobacco-induced psychosis, but is traditionally not associated with the induction of psychosis.
The code F15.5 also includes caffeine-induced psychosis, despite not being specifically listed in the DSM-IV. However, there is evidence that caffeine, in extreme acute doses or when taken in excess for long periods of time, may induce psychosis. [34] [35]
Other drugs illegal in America (not listed above), including:
Plants:
Substances chiefly nonmedicinal as to source:
Antipsychotics, previously known as neuroleptics and major tranquilizers, are a class of psychotropic medication primarily used to manage psychosis, principally in schizophrenia but also in a range of other psychotic disorders. They are also the mainstay, together with mood stabilizers, in the treatment of bipolar disorder. Moreover, they are also used as adjuncts in the treatment of treatment-resistant major depressive disorder.
Catatonia is a complex syndrome, most commonly seen in people with underlying mood or psychotic disorders. People with catatonia have abnormal movement and behaviors, which vary from person to person and fluctuate in intensity within a single episode. People with catatonia appear withdrawn, meaning that they do not interact with the outside world and have difficulty processing information. They may be nearly motionless for days on end or perform repetitive purposeless movements. Two people may exhibit very different sets of behaviors and both still be diagnosed with catatonia. Treatment with benzodiazepines or ECT are most effective and lead to remission of symptoms in most cases.
Psychosis is a condition of the mind or psyche that results in difficulties determining what is real and what is not real. Symptoms may include delusions and hallucinations, among other features. Additional symptoms are disorganized thinking and incoherent speech and behavior that is inappropriate for a given situation. There may also be sleep problems, social withdrawal, lack of motivation, and difficulties carrying out daily activities. Psychosis can have serious adverse outcomes.
Schizophrenia is a mental disorder characterized variously by hallucinations, delusions, disorganized thinking and behavior, and flat or inappropriate affect. Symptoms develop gradually and typically begin during young adulthood and are never resolved. There is no objective diagnostic test; diagnosis is based on observed behavior, a psychiatric history that includes the person's reported experiences, and reports of others familiar with the person. For a diagnosis of schizophrenia, the described symptoms need to have been present for at least six months or one month. Many people with schizophrenia have other mental disorders, especially mood disorders, anxiety disorders, and obsessive–compulsive disorder.
A psychiatric or psychotropic medication is a psychoactive drug taken to exert an effect on the chemical makeup of the brain and nervous system. Thus, these medications are used to treat mental illnesses. These medications are typically made of synthetic chemical compounds and are usually prescribed in psychiatric settings, potentially involuntarily during commitment. Since the mid-20th century, such medications have been leading treatments for a broad range of mental disorders and have decreased the need for long-term hospitalization, thereby lowering the cost of mental health care. The recidivism or rehospitalization of the mentally ill is at a high rate in many countries, and the reasons for the relapses are under research.
Schizoaffective disorder is a mental disorder characterized by symptoms of both schizophrenia (psychosis) and a mood disorder - either bipolar disorder or depression. The main diagnostic criterion is the presence of psychotic symptoms for at least two weeks without prominent mood symptoms. Common symptoms include hallucinations, delusions, disorganized speech and thinking, as well as mood episodes. Schizoaffective disorder can often be misdiagnosed when the correct diagnosis may be psychotic depression, bipolar I disorder, schizophreniform disorder, or schizophrenia. This is a problem as treatment and prognosis differ greatly for most of these diagnoses. Many people with schizoaffective disorder have other mental disorders including anxiety disorders.
Stimulant psychosis is a mental disorder characterized by psychotic symptoms. It involves and typically occurs following an overdose or several day binge on psychostimulants, although it can occur in the course of stimulant therapy, particularly at higher doses. One study reported occurrences at regularly prescribed doses in approximately 0.1% of individuals within the first several weeks after starting amphetamine or methylphenidate therapy. Methamphetamine psychosis, or long-term effects of stimulant use in the brain, depend upon genetics and may persist for some time.
Thought broadcasting is a type of delusional condition in which the affected person believes that others can hear their inner thoughts, despite a clear lack of evidence. The person may believe that either those nearby can perceive their thoughts or that they are being transmitted via mediums such as television, radio or the internet. Different people can experience thought broadcasting in different ways. Thought broadcasting is most commonly found among people who have a psychotic disorder, specifically schizophrenia.
Schizophrenia is a neurodevelopmental disorder with no precise or single cause. Schizophrenia is thought to arise from multiple mechanisms and complex gene–environment interactions with vulnerability factors. Risk factors of schizophrenia have been identified and include genetic factors, environmental factors such as experiences in life and exposures in a person's environment, and also the function of a person's brain as it develops. The interactions of these risk factors are intricate, as numerous and diverse medical insults from conception to adulthood can be involved. Many theories have been proposed including the combination of genetic and environmental factors may lead to deficits in the neural circuits that affect sensory input and cognitive functions.
Dual diagnosis is the condition of having a mental illness and a comorbid substance use disorder. There is considerable debate surrounding the appropriateness of using a single category for a heterogeneous group of individuals with complex needs and a varied range of problems. The concept can be used broadly, for example depression and alcohol use disorder, or it can be restricted to specify severe mental illness and substance use disorder, or a person who has a milder mental illness and a drug dependency, such as panic disorder or generalized anxiety disorder and is dependent on opioids. Diagnosing a primary psychiatric illness in people who use substances is challenging as substance use disorder itself often induces psychiatric symptoms, thus making it necessary to differentiate between substance induced and pre-existing mental illness.
Post-acute withdrawal syndrome (PAWS) is a hypothesized set of persistent impairments that occur after withdrawal from alcohol, opiates, benzodiazepines, antidepressants, and other substances. Infants born to mothers who used substances of dependence during pregnancy may also experience a PAWS. While PAWS has been frequently reported by those withdrawing from opiate and alcohol dependence, the research has limitations. Protracted benzodiazepine withdrawal has been observed to occur in some individuals prescribed benzodiazepines.
Postpartum psychosis (PPP), also known as puerperal psychosis or peripartum psychosis, involves the abrupt onset of psychotic symptoms shortly following childbirth, typically within two weeks of delivery but less than 4 weeks postpartum. PPP is a condition currently represented under "Brief Psychotic Disorder" in the Diagnostic and Statistical Manual of Mental Disorders, Volume V (DSM-V). Symptoms may include delusions, hallucinations, disorganized speech, and/or abnormal motor behavior. Other symptoms frequently associated with PPP include confusion, disorganized thought, severe difficulty sleeping, variations of mood disorders, as well as cognitive features such as consciousness that comes and goes or disorientation.
Derealization is an alteration in the perception of the external world, causing those with the condition to perceive it as unreal, distant, distorted or in other words falsified. Other symptoms include feeling as if one's environment is lacking in spontaneity, emotional coloring, and depth. Described as "Experiences of unreality or detachment with respect to surroundings in the DSM-5, it is a dissociative symptom that may appear in moments of severe stress.
Childhood schizophrenia is similar in characteristics of schizophrenia that develops at a later age, but has an onset before the age of 13 years, and is more difficult to diagnose. Schizophrenia is characterized by positive symptoms that can include hallucinations, delusions, and disorganized speech; negative symptoms, such as blunted affect and avolition and apathy, and a number of cognitive impairments. Differential diagnosis is problematic since several other neurodevelopmental disorders, including autism spectrum disorder, language disorder, and attention deficit hyperactivity disorder, also have signs and symptoms similar to childhood-onset schizophrenia.
The prognosis of schizophrenia is varied at the individual level. In general it has great human and economics costs. It results in a decreased life expectancy of 12–15 years primarily due to its association with obesity, little exercise, and smoking, while an increased rate of suicide plays a lesser role. These differences in life expectancy increased between the 1970s and 1990s, and between the 1990s and 2000s. This difference has not substantially changed in Finland for example – where there is a health system with open access to care.
The diagnosis of schizophrenia, a psychotic disorder, is based on criteria in either the American Psychiatric Association's Diagnostic and Statistical Manual of Mental Disorders, or the World Health Organization's International Classification of Diseases (ICD). Clinical assessment of schizophrenia is carried out by a mental health professional based on observed behavior, reported experiences, and reports of others familiar with the person. Diagnosis is usually made by a psychiatrist. Associated symptoms occur along a continuum in the population and must reach a certain severity and level of impairment before a diagnosis is made. Schizophrenia has a prevalence rate of 0.3-0.7% in the United States.
A psychoactive drug, mind-altering drug, or consciousness-altering drug is a chemical substance that changes brain function and results in alterations in perception, mood, consciousness, cognition, or behavior. The term psychotropic drug is often used interchangeably, while some sources present narrower definitions. These substances may be used medically; recreationally; to purposefully improve performance or alter consciousness; as entheogens for ritual, spiritual, or shamanic purposes; or for research, including psychedelic therapy. Physicians and other healthcare practitioners prescribe psychoactive drugs from several categories for therapeutic purposes. These include anesthetics, analgesics, anticonvulsant and antiparkinsonian drugs as well as medications used to treat neuropsychiatric disorders, such as antidepressants, anxiolytics, antipsychotics, and stimulants. Some psychoactive substances may be used in detoxification and rehabilitation programs for persons dependent on or addicted to other psychoactive drugs.
Dopamine supersensitivity psychosis is a hypothesis that attempts to explain the phenomenon in which psychosis (e.g., hallucinations, delusions) occurs despite treatment with escalating doses of antipsychotics. Dopamine supersensitivity may be caused by the dopamine receptor D2 antagonizing effect of antipsychotics, causing a compensatory increase in D2 receptors within the brain that sensitizes neurons to endogenous release of the neurotransmitter dopamine. Because psychosis is thought to be mediated—at least in part—by the activity of dopamine at D2 receptors, the activity of dopamine in the presence of supersensitivity may paradoxically give rise to worsening psychotic symptoms despite antipsychotic treatment at a given dose. This phenomenon may co-occur with tardive dyskinesia, a rare movement disorder that may also be due to dopamine supersensitivity.
Caffeine-induced psychosis is a relatively rare phenomenon that can occur in otherwise healthy people. Overuse of caffeine may also worsen psychosis in people suffering from schizophrenia. It is characterized by psychotic symptoms such as delusions, paranoia, and hallucinations. This can happen with ingestion of high doses of caffeine, or when caffeine is chronically abused, but the actual evidence is currently limited.