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Related Concept Videos

Drugs Acting on Autonomic Ganglia: Stimulants01:23

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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...
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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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Updated: Apr 26, 2026

Creating Dynamic Images of Short-lived Dopamine Fluctuations with lp-ntPET: Dopamine Movies of Cigarette Smoking
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Nicotine patch preloading for smoking cessation (the preloading trial): study protocol for a randomized controlled

Nicola Lindson-Hawley1, Tim Coleman, Graeme Docherty

  • 1Nuffield Department of Primary Care Health Sciences, University of Oxford, Radcliffe Observatory Quarter, Woodstock Road, OX2 6GG Oxford, UK. nicola.lindson-hawley@phc.ox.ac.uk.

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Summary
This summary is machine-generated.

Nicotine preloading, using nicotine replacement therapy before quitting smoking, may improve cessation rates. This large trial will determine its effectiveness and cost-effectiveness for smokers aiming to quit.

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Area of Science:

  • Clinical Trials
  • Public Health
  • Pharmacology

Background:

  • Nicotine replacement therapy (NRT) is typically used on quit day.
  • Preloading NRT before quit day may reduce smoking satisfaction and reward association.
  • Evidence for nicotine preloading effectiveness is currently inconclusive.

Purpose of the Study:

  • To evaluate the effectiveness and cost-effectiveness of nicotine preloading.
  • To investigate potential mediators and moderators of the preloading effect.
  • To provide a realistic estimate of the intervention's success in standard practice.

Main Methods:

  • Multicenter, non-blinded, randomized controlled trial in the UK.
  • 1786 smokers randomized to 21 mg nicotine patches or no preloading for 4 weeks before quitting.
  • Primary outcome: biochemically verified 6-month continuous abstinence.

Main Results:

  • Primary outcome data is not yet available as this is a study protocol.
  • Secondary outcomes include point prevalence and duration of abstinence, side effects, and costs.
  • The trial aims to recruit a large sample size to ensure robust findings.

Conclusions:

  • This large pragmatic trial will significantly contribute to understanding nicotine preloading.
  • Results will inform its potential integration into standard smoking cessation services.
  • The study will also explore cost-effectiveness and mediating factors previously unexamined.