Alcoholic Hallucinosis - Clinical Features, Diagnosis, and Treatment

Introduction

Alcohol is the most commonly abused psychoactive substance. This substance can lead to various conditions such as intoxication, withdrawal, delirium tremens, Wernicke-Korsakoff syndrome, alcohol-induced psychotic disorder, and alcoholic dementia. A condition similar to alcoholic hallucinosis was first described in 1847 by Marcel as "folie divrogne" (drunken madness), but there was confusion about its classification. Some patients were misdiagnosed with paranoid schizophrenia and treated with neuroleptics indefinitely. Alcoholic hallucinosis is now recognized as a distinct condition with its etiology and outcome. Patients with alcoholic hallucinosis were included in a follow-up study. It was discovered that 13.5 percent of them did not relapse while abstaining from alcohol, and 21 percent did not continue to have hallucinations. None of the patients needed a revised diagnosis of schizophrenia or affective disorder. There was no correlation between the development of hallucinations and the severity of alcohol dependence at baseline.

What Is Alcoholic Hallucinosis?

Alcoholic hallucinosis is a rare complication of long-term heavy drinking. It mainly involves features of auditory hallucinations during or after heavy alcohol use. Bleuler (1916) named this condition and distinguished it from delirium tremens. It usually involves hearing voices, delusions, and mood changes while the person is fully conscious. In some cases, it can develop into a chronic form similar to schizophrenia (a severe mental health condition that impairs a person's ability to think, feel, and behave).

What Is the Pathogenesis of Alcoholic Hallucinosis?

Studies have suggested several neurobiological mechanisms that may explain hallucinations in patients with alcohol dependence. These include:

• Dysfunction of the dopaminergic system.

• Dysfunction of the serotonergic system.

• Decreased levels of inhibitory neurotransmitters and increased excitatory neurotransmitters like glutamine and asparagine.

• Changes in beta-carboline activity.

• Possible damage to auditory and sensory pathways.

Experimental evidence shows that alcohol consumption in rats enhances dopamine release from the nigrostriatal and mesolimbic pathways. Increased levels of homovanillic acid (an indicator of dopaminergic activity) in cerebrospinal fluid. These are linked to the frequency of hallucinations during alcohol withdrawal. In patients with acute alcoholic hallucinosis, higher plasma concentrations of glutamate and aspartate indicate hyperactive excitatory neurotransmission, potentially worsened by reduced inhibitory GABAergic activity after stopping alcohol use. Elevated plasma levels of beta-carboline, a substance known to cause hallucinations, were also found in these patients. Also, toxic damage to the sensory and auditory pathways from excessive alcohol use may contribute to hallucinations, similar to the mechanism behind tinnitus.

What Are the Risk Factors for Alcoholic Hallucinosis?

Following are some factors that increase the risk of developing alcoholic hallucinosis.

• Heavy, prolonged alcohol use and the use of other substances like cocaine, methamphetamines, or psychedelics (for example, lysergic acid diethylamide or LSD) increase the risk of developing alcoholic hallucinosis.

• Genetic predisposition.

• Age and the age at which drinking began.

• Type of alcohol consumed.

• Pre-existing mental health conditions include post-traumatic stress disorder (traumatic stress reactions), bipolar disorder (extreme mood swings), schizophrenia (distorted thinking or perceptions), and depression.

• Low socioeconomic status.

What Are the Clinical Features of Alcoholic Hallucinosis?

Alcoholic hallucinosis symptoms start gradually. It begins with sleep disorders and then progresses to anxiety. Acute alcoholic hallucinosis often develops as part of alcohol withdrawal syndrome. It usually occurs within two days after the last alcohol intake. Some cases may even occur during ongoing heavy drinking.

Initial symptoms include:

• Patients suddenly experience auditory hallucinations. It presents as often hearing one or two voices repeating individual words or short phrases. These voices engage in everyday conversation, not directly addressing the patient, making them passive observers.

• Different onset patterns include seizure-like episodes with periods of clear thinking or initial sensory distortions (for example, hearing squeaks, whistles, or musical sounds) that evolve into auditory hallucinations.

Progression to advanced stage

• As the condition progresses, patients experience more complex verbal and auditory hallucinations, often combined with delusions. The hallucinations may become condemning, with voices discussing the patient's actions and behavior negatively and cynically.

• Initially, neutral hallucinations may become directly accusatory, addressing the patient and discussing themes such as stalking, alcohol abuse, immoral behavior, and sexual relationships.

• In addition to auditory hallucinations, patients may experience visual hallucinations related to the auditory content. Less frequently, tactile hallucinations are also seen. These symptoms help differentiate alcoholic hallucinosis from delirium tremens.

• Delusions often accompany hallucinations. It typically involves persecution or poisoning ideation.

How Do Alcoholic Hallucinosis Differ From Delirium Tremens?

Alcohol hallucinosis usually starts soon after someone reduces or stops drinking, lasting from a few days to a few weeks. In contrast, delirium tremens (DTs) typically begin two to five days after alcohol consumption ends and can rapidly worsen. People with alcohol hallucinosis are generally aware that their hallucinations are not real. However, those experiencing DTs may struggle to distinguish between reality and hallucinations, leading to significant distress and fear. DTs are more severe and can involve serious physical and mental symptoms, such as seizures, which can be life-threatening if untreated. Alcohol hallucinosis mainly affects the mind but can still be intense and difficult to manage.

Management:

DTs are a medical emergency due to their potential life-threatening nature, often requiring hospitalization for proper treatment. Alcohol hallucinosis is serious; it typically poses less immediate medical risk. This can be managed with general medical care or at home.

How Can Alcoholic Hallucinosis Be Diagnosed?

To correctly diagnose acute alcoholic hallucinosis, the following steps should be taken:

• It is crucial to take a thorough history of the patient's alcohol use.

• It is important to distinguish it from delirium tremens and schizophrenia.

• To rule out other causes of altered mental status like infections, trauma, or metabolic issues such as liver disease, thiamine deficiency, and electrolyte imbalances.

Diagnostic steps may include brain CT (computed tomography) scans, urinalysis, urine drug screens, and lab tests for electrolytes, liver function, ammonia levels, and toxicology. Patients with alcohol use disorder often have other conditions, so a detailed diagnostic evaluation is essential—diagnostic findings observed in alcoholic hallucinosis patients.

Some studies found through positron emission tomography (PET) that alcoholic psychosis is linked to reduced activity in the thalamus.

1. Single photon emission computed tomography (SPECT) was used in some studies to observe decreased blood flow in the thalamus, frontal lobes, and basal ganglia in patients with alcoholic hallucinosis.

2. A study by Dr. JM Anderson in East Glasgow followed 124 patients with alcohol dependence syndrome (ADS). Initially, 13 percent of these patients had alcoholic hallucinosis, and five patients experienced persistent hallucinations.

What Is the Treatment for Alcoholic Hallucinosis?

Abstinence from alcohol is a crucial step in alcoholic hallucinosis treatment.

• Neuroleptics: Commonly used to treat the condition. Patients often benefit from antipsychotic medications. Sometimes, it is combined with sedatives.

• Valproate: Recently found to be effective and well-tolerated in treatment.

• Benzodiazepines: Should be used alongside antipsychotics to prevent convulsions during alcohol withdrawal.

• Since alcohol addiction and withdrawal cause nutritional deficiencies, healthcare providers offer dietary guidance and supplements to restore the body’s nutrients.

For effective management of alcoholic hallucinosis, which indicates severe alcohol dependence, addiction treatment at an inpatient facility is necessary. This treatment typically includes:

• Medical detoxification.

• Counseling.

• Behavioral therapies.

• Support groups.

Conclusion

Alcoholic hallucinosis is a serious condition that needs immediate medical attention and thorough treatment. Knowing the causes, symptoms, and treatment options is key to managing it effectively. People with alcoholic hallucinosis can recover and live healthier, alcohol-free lives with the help of proper medical support. These hallucinations can be avoided by either moderating alcohol intake or abstaining from it entirely. Recognizing early warning signs and seeking prompt medical help can help prevent these complications.