All of the drugs listed are considered to be CNS depressants. While generally classified as a psychedelic, marijuana has multiple central depressant effects such as sedation and muscle relaxation. Also, alcohol is another commonly used depressant. 

Wernicke-Korsakoff syndrome is caused by a severe deficiency in thiamine, often seen in severe alcohol dependency. It is characterized by visual disturbances, ataxia, and altered consciousness. Wolf-Hirschhorn syndrome is a genetic disorder causing developmental disability and may involve seizures. Lewy body dementia is associated with Parkinson's disease. Agnosia is a neurological disorder causing impaired ability to process sensory information.

All of the items listed are part of the DSM V criteria for substance abuse. In addition, the individual's symptoms must not qualify for substance dependence and recurrent substance-related legal problems are other DSM V criteria for substance abuse.

The symptoms described by this patient put his alcohol use in the category of substance dependency, according to the DSM V, a more severe form of abuse than substance addiction. The criteria for this condition are:

1. Tolerance 
2. Withdrawal
3. Unintentional excesses in consumption
4. Persistent desire or unsuccessful efforts to reduce or control substance use
5. A great deal of time is spent to get, use, or recover from the substance
6. Interference with social life
7. The substance use is continued despite knowledge problems caused by use

Prolonged alcohol abuse can result in a severe deficiency in thiamine, or vitamin B1 by reducing dietary thiamine intake, impairing gastrointestinal absorption of thiamine, and causing impaired thiamine utilization in cells. Note that individuals who partake in prolonged alcohol abuse may have various other dietary deficiencies.

Delirium tremens (DT) is a rapid onset of confusion seen during alcohol withdrawal. The symptoms of DT include altered mental status, autonomic instability, and even seizures. DT is also characterized by hallucinations such as the sensation of something "crawling" on the patient. DT is the most severe consequence of withdrawal and can be fatal if untreated.

Conversion disorder is typified by numbness, paralysis, loss of vision, or other neurological symptoms after a traumatic or stressful event, without any identifiable medical cause. Schizophrenia, bipolar disorder, and stiff person syndrome all have medically identifiable causes. 

Delirium is an organic dysfunction of the brain usually seen in sick patients post-op. These patients need frequent reorientation to name, time, and place until the delirium resolves. Agitation, confusion, and difficult to control behavior is typically controlled with antipsychotics, however, they are not first line treatment. Restraints should be avoided at all costs.