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Substance use disorders involve a pattern of using drugs more extensively than intended and continuing use despite harmful consequences. This includes legal substances like alcohol and nicotine, as well as illegal drugs. These disorders often involve both physical and psychological dependence, reflecting compulsive use of substances that significantly alter thoughts, feelings, and behaviors, contributing to a major public health issue.
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The pancreas, an elongated and flat gland situated behind the stomach, serves a vital function in digesting food and managing blood sugar levels.
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Drug dependence, abuse, and addiction are complex phenomena that can precipitate various abnormal states. Physical dependence refers to a state of pharmacological adaptation to a drug. This adaptation often results in tolerance—a reduced response to the drug after repeated administrations. When the drug use is abruptly stopped, withdrawal symptoms occur due to the body's need to readjust from the pharmacologically induced imbalance. However, tolerance and withdrawal symptoms do not...
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Medications are typically administered to achieve therapeutic effects. Some drugs can modify an individual's mood and perception, frequently resulting in various enjoyable experiences. However, this can result in drug dependency, a condition marked by continuous drug use despite potential negative consequences. Drug dependency primarily falls into two categories: psychological and physical dependence. Psychological dependence occurs when the pleasurable feelings induced by the drug...
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Depressant drugs, including alcohol and sedative-hypnotics, diminish central nervous system activity by enhancing the action of gamma-aminobutyric acid (GABA), a neurotransmitter that reduces brain activity and promotes relaxation. These substances can have various therapeutic uses but also pose significant risks, especially when misused or combined.
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Chronic Intermittent Ethanol Vapor Exposure Paired with Two-Bottle Choice to Model Alcohol Use Disorder
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Alcohol use disorder is a chronic disease.

Nicholas W Gilpin1,2,3,4, Patricia E Molina1,2

  • 1Department of Physiology, LSU Health Sciences Center, New Orleans, Louisiana, USA.

Alcohol, Clinical & Experimental Research
|January 13, 2026
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Alcohol use disorder (AUD) significantly impacts health and the economy, affecting nearly every organ system. Continued research is crucial to address this widespread public health issue.

Keywords:
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Area of Science:

  • Public Health
  • Neuroscience
  • Internal Medicine

Background:

  • Alcohol use disorder (AUD) is a chronic, relapsing brain disease with significant health, societal, and economic consequences.
  • Alcohol misuse is a major driver of multimorbidity, exacerbating conditions like cancer and liver disease.
  • AUD remains a prevalent and costly public health issue in the US, contributing to over 90,000 deaths annually.

Purpose of the Study:

  • To summarize the widespread and systemic impact of alcohol misuse on US citizens and society.
  • To highlight the need for sustained investment in translational alcohol research.
  • To underscore the public health imperative of addressing alcohol-related diseases.

Main Methods:

  • This paper provides a comprehensive summary of existing research on the health impacts of alcohol misuse.
  • It synthesizes data on the effects of alcohol on various organ systems and comorbidities.
  • The review examines the economic burden and societal consequences of alcohol use disorder.

Main Results:

  • Chronic heavy alcohol use adversely affects nearly every organ system, including the brain, liver, heart, and endocrine system.
  • Alcohol misuse contributes to neurological and psychiatric comorbidities, cognitive decline, and increased cancer risk.
  • Specific populations, such as women and older adults, face heightened vulnerability due to rising alcohol misuse rates.

Conclusions:

  • Sustained and enhanced support for alcohol-related biomedical research is essential.
  • Despite available treatments, underutilization and variable patient response necessitate further research and investment.
  • Addressing the substantial burden of disease, disability, and death from alcohol misuse is a critical public health priority.