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Nicotine preloading for smoking cessation: the Preloading RCT.

Paul Aveyard1, Nicola Lindson1, Sarah Tearne1

  • 1Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, UK.

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|August 7, 2018
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Summary
This summary is machine-generated.

Nicotine preloading with nicotine patches before quitting smoking may increase success rates. However, its effectiveness is reduced if it discourages the use of varenicline post-cessation, impacting long-term health and cost-effectiveness.

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Area of Science:

  • Public Health
  • Clinical Trials
  • Health Economics

Background:

  • Nicotine preloading, using nicotine replacement therapy before a quit date, aims to reduce smoking urges and relapse.
  • Previous evidence on preloading effectiveness was inconclusive, lacking mechanistic and cost-effectiveness data.

Purpose of the Study:

  • To evaluate the effectiveness, safety, tolerability, and cost-effectiveness of nicotine preloading in a routine National Health Service (NHS) setting.
  • To investigate the mechanisms of action for nicotine preloading in smoking cessation.

Main Methods:

  • An open-label randomized controlled trial involving 1792 participants seeking to quit smoking.
  • Intervention: 4 weeks of 21 mg/24 hour nicotine patch preloading with minimal behavioral support.
  • Comparison: Equivalent behavioral support without preloading. Outcomes assessed via Russell Standard for 6-month abstinence, safety, and cost-effectiveness.

Main Results:

  • Nicotine preloading showed a trend towards increased 6-month abstinence (17.5% vs 14.4%), which became statistically significant after adjusting for varenicline use (OR 1.34, p=0.028).
  • No significant increase in serious adverse events; mild nausea was slightly more common in the preloading group.
  • Reduced urges to smoke and smoke inhalation were identified as mediators of preloading's effect. Preloading was found to be cost-saving in the long term.

Conclusions:

  • Nicotine-patch preloading for 4 weeks prior to quitting smoking can enhance successful cessation rates.
  • The benefit of preloading is diminished by reduced use of varenicline post-cessation.
  • Optimizing the use of varenicline alongside nicotine preloading could maximize health benefits and cost savings.