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Related Concept Videos

Drugs Acting on Autonomic Ganglia: Stimulants01:23

Drugs Acting on Autonomic Ganglia: Stimulants


Ganglionic stimulants activate NM nicotinic receptors in autonomic ganglia, falling into two categories: nicotine mimetics [e.g., lobeline, dimethylpiperazine, tetramethylammonium] and muscarinic receptor agonists [e.g., muscarine, methacholine]. The first category's action is rapid and blocked by nicotinic receptor antagonists, while the second category's action is delayed and blocked by atropine-like agents. Nicotine, an alkaloid, affects the heart rate by stimulating sympathetic or...
Drug Dependence01:17

Drug Dependence

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...
CNS Depressants: Alcohol and Nicotine01:27

CNS Depressants: Alcohol and Nicotine

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...
Cholinergic Receptors: Nicotinic01:15

Cholinergic Receptors: Nicotinic

Nicotinic receptors are ligand-gated ion channels that are activated by acetylcholine and nicotine. Upon activation, they cause a rapid increase in the permeability of cells to K+, Na+, and Ca2+, followed by depolarization and excitation. They are in the autonomic ganglia, skeletal neuromuscular junction, CNS, and adrenal medulla.
There are two types of nicotinic receptors: neuromuscular (NM/NM/N1) and neuronal (NN/NN/N2). The two families differ based on their location and selectivity to...
Drug Abuse and Addiction: Pharmacological Phenomena01:15

Drug Abuse and Addiction: Pharmacological Phenomena

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 necessarily...
Stimulants01:29

Stimulants

Stimulants are substances that enhance neural activity and elevate dopamine levels in the brain, leading to their highly addictive nature. These drugs include cocaine, amphetamines, MDMA, caffeine, and nicotine, each with distinct mechanisms of action and varied health implications.
Cocaine can be administered via snorting, injection, or smoking. It primarily functions by blocking the reuptake of dopamine, resulting in a euphoric high characterized by an intense sensation of happiness and...

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Related Experiment Video

Updated: Jun 5, 2026

Spectral Confocal Imaging of Fluorescently tagged Nicotinic Receptors in Knock-in Mice with Chronic Nicotine Administration
08:47

Spectral Confocal Imaging of Fluorescently tagged Nicotinic Receptors in Knock-in Mice with Chronic Nicotine Administration

Published on: February 10, 2012

Nicotine dependence.

Wade H Berrettini1

  • 1Dr. Berrettini is the Karl E. Rickels Professor of Psychiatry and Director of the Center for Neurobiology and Behavior, University of Pennsylvania School of Medicine, Philadelphia, PA.

Psychiatry (Edgmont (Pa. : Township))
|January 4, 2011
PubMed
Summary
This summary is machine-generated.

Psychiatrists must address nicotine dependence (ND) due to high smoking rates in psychiatric patients. Treating ND is crucial for improving long-term health outcomes in this population.

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Local Application of Drugs to Study Nicotinic Acetylcholine Receptor Function in Mouse Brain Slices
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Local Application of Drugs to Study Nicotinic Acetylcholine Receptor Function in Mouse Brain Slices

Published on: October 29, 2012

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Last Updated: Jun 5, 2026

Spectral Confocal Imaging of Fluorescently tagged Nicotinic Receptors in Knock-in Mice with Chronic Nicotine Administration
08:47

Spectral Confocal Imaging of Fluorescently tagged Nicotinic Receptors in Knock-in Mice with Chronic Nicotine Administration

Published on: February 10, 2012

Local Application of Drugs to Study Nicotinic Acetylcholine Receptor Function in Mouse Brain Slices
10:04

Local Application of Drugs to Study Nicotinic Acetylcholine Receptor Function in Mouse Brain Slices

Published on: October 29, 2012

Area of Science:

  • Psychiatry
  • Addiction Medicine
  • Public Health

Background:

  • Nicotine dependence (ND) is highly prevalent among individuals with psychiatric disorders.
  • Approximately 90% of alcohol-dependent and opioid-dependent individuals also exhibit nicotine dependence.
  • Around 80% of patients with schizophrenia are identified as daily smokers.

Purpose of the Study:

  • To highlight the significant overlap between psychiatric disorders and nicotine dependence.
  • To emphasize the clinical necessity for psychiatrists to focus on treating ND.
  • To underscore the long-term health implications of smoking in psychiatric populations.

Main Methods:

  • Literature review and synthesis of existing epidemiological data.
  • Analysis of prevalence rates of nicotine dependence in various psychiatric conditions.
  • Citation of key studies on smoking behaviors in psychiatric patients.

Main Results:

  • High comorbidity rates of nicotine dependence across psychiatric disorders, including substance use disorders and schizophrenia.
  • Consistent evidence indicating elevated smoking prevalence in individuals with mental illness compared to the general population.
  • Identification of specific psychiatric conditions with particularly high rates of daily smoking.

Conclusions:

  • Psychiatrists must prioritize the assessment and treatment of nicotine dependence in their clinical practice.
  • Addressing smoking behaviors is essential for mitigating the severe long-term health consequences faced by psychiatric patients.
  • Integrating ND treatment into psychiatric care can improve overall patient outcomes and quality of life.