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Related Concept Videos

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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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Ethanol, a clear colorless alcohol, has been consumed by humans for millennia, but its effects on the body are far from benign. At lower doses, it induces decreased inhibitions and loquaciousness, leading to its social appeal. However, it can cause severe consequences at higher doses, such as coma and respiratory depression, due to its zero-order elimination kinetics. Chronic ethanol abuse wreaks havoc on multiple organ systems, particularly the CNS and the liver. Abrupt cessation of ethanol...
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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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Psychoactive drugs impact brain function, influencing perception, mood, consciousness, cognition, and behavior. These substances are grouped based on their effects and the mechanisms by which they act.
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Physiologic Effects of Substance Use.

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Summary
This summary is machine-generated.

This review details the diverse physiological and psychological impacts of common substance use, differentiating between acute and chronic exposure effects. Understanding these substance-induced changes is crucial for effective medical intervention and patient care.

Keywords:
Mechanism of actionPhysiologic effects of substancesSubstance induced psychosisSubstance useToxicity

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Area of Science:

  • Pharmacology and Toxicology
  • Neuroscience
  • Addiction Medicine

Background:

  • Substance use frequently leads to significant physiological and psychological effects.
  • These effects can be intentional or unintended complications of drug exposure.
  • Acute and long-term substance exposure often manifest differently due to receptor interactions and homeostatic adaptations.

Purpose of the Study:

  • To comprehensively review the physiological and psychological effects of commonly encountered substances.
  • To elucidate the mechanisms underlying both short-term and long-term substance-induced changes.
  • To provide a consolidated resource on the impact of various drugs of abuse.

Main Methods:

  • Literature review of peer-reviewed articles.
  • Synthesis of data on the effects of ethanol, sedative-hypnotics, stimulants, marijuana, opioids, nicotine, hydrocarbons, and nitrous oxide.
  • Analysis of receptor-mediated actions and homeostatic alterations.

Main Results:

  • Detailed descriptions of physiological and psychological effects for each substance class.
  • Identification of distinct acute versus chronic exposure profiles.
  • Explanation of neurobiological pathways involved in substance effects.

Conclusions:

  • Substance use exerts a wide range of physiological and psychological effects.
  • The impact of substances varies based on the drug, dose, duration, and individual factors.
  • This review highlights the complexity of substance use disorders and their management.