Lois (UK) on 06/13/2026

Poisonous Substances and Intoxicants

Recreational Drugs and Stimulants: Use of cannabis, cocaine, amphetamines, methamphetamine, ecstasy (MDMA), LSD, ketamine, mushrooms, and synthetic cannabinoids (e.g., Spice, K2).

Alcohol and Sedatives: Heavy or chronic alcohol use, alcohol withdrawal (including delirium tremens), and benzodiazepine withdrawal or paradoxical reactions.

Medications and Toxins: Certain prescription drugs (including fluoroquinolones, mefloquine, and high-dose antihistamines or dextromethorphan), volatile solvents (toluene, butane), and poisoning by plants, fungi, metals, or animal toxins.

Physical Ailments and Medical Conditions

Neurological Disorders: Alzheimer's disease, dementia, multiple sclerosis, Huntington's disease, epilepsy, brain tumors, cerebrovascular disease (stroke), severe head injuries (concussions/TBI), and infections of the brain or spinal cord (encephalitis, meningitis).

Endocrine and Hormonal Conditions: Hypothyroidism, hyperthyroidism, Cushing's syndrome, Addison's disease, hypoparathyroidism, and postpartum psychosis.

Metabolic and Nutritional Deficiencies: Vitamin B1 (thiamine) and B12 deficiencies, electrolyte disturbances (hypocalcemia, hyponatremia, etc.), hypoglycemia, hypoxia, and liver or kidney failure.

Autoimmune and Inflammatory Disorders: Systemic lupus erythematosus (lupus), sarcoidosis, Hashimoto's encephalitis, anti-NMDA-receptor encephalitis, and Lyme disease.

Other Medical Issues: Deafness, visual nerve injury, migraine, and inborn errors of metabolism (e.g., Wilson's disease, porphyria).

All Other Causes (Psychiatric, Genetic, and Environmental)

Primary Psychiatric Disorders: Schizophrenia, schizoaffective disorder, schizophreniform disorder, brief psychotic disorder, delusional disorder, schizotypal personality disorder, bipolar disorder, and major depression (including psychotic depression).

Genetic Factors: Family history of psychosis or mental illness, which increases susceptibility.

Brain Chemistry and Development: Differences in brain development and changes in brain chemistry, specifically increases in dopamine or cortisol release during stress.

Environmental and Psychological Triggers: Severe distress, traumatic experiences (abuse, trauma), unusually high levels of stress or anxiety, sleep deprivation, sensory deprivation, and social isolation.

Substance Withdrawal: Stopping the use of drugs or alcohol after regular use, which can trigger symptoms even without acute intoxication.

Untreated gallstones can cause delirium and severe mental deterioration, particularly in elderly patients, but they do not typically cause primary psychosis.

Delirium and Confusion: In cases of acute cholangitis (infection of the bile ducts), the resulting sepsis and systemic inflammation can lead to Reynolds' pentad, which includes altered mental status, hypotension, and Charcot's triad. Older patients may present specifically with lethargy, confusion, or delirium due to the severity of the infection.

Misdiagnosis as Senility: Historical and clinical observations note that obstructive gallstones in the elderly can cause mental confusion and physical deterioration that mimics senility or dementia. These symptoms often reverse after the stones are removed, indicating the mental changes were secondary to the physical obstruction and infection.

Depression vs. Psychosis: While there is a documented association between gallstones and depressive symptoms (mediated by chronic inflammation and gut-brain axis disruptions), this is distinct from psychosis. The search context does not support gallstones causing primary psychotic features (such as hallucinations or delusions unrelated to metabolic encephalopathy).

Severe Complications: If left undetected, gallstones can lead to pancreatitis, cholecystitis, and biliary cirrhosis. The resulting multi-organ dysfunction and septicemia are the mechanisms that drive severe neurological symptoms like delirium, rather than a direct psychiatric pathology.

Metabolic encephalopathy can lead to symptoms of psychotic illness, particularly when caused by specific inborn errors of metabolism (IEMs) or severe systemic dysfunction.

Psychiatric Manifestations: Conditions such as Wilson disease, Niemann-Pick type C, and certain urea cycle disorders are strongly associated with schizophrenia-like symptoms, including psychosis, delusions, and hallucinations.

Key Indicators: Psychotic symptoms in metabolic encephalopathy are often atypical, featuring visual hallucinations (rather than auditory) and acute onset, which should raise suspicion of an underlying organic disorder.

Reversibility: While these psychiatric symptoms can be severe and persistent, they are often reversible if the underlying metabolic disturbance is promptly identified and treated; however, untreated cases can lead to permanent brain damage, cognitive decline, or coma.