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CompletedNCT01980550Updated Nov 13, 2013

Association of Functional COMT Val108/Met Polymorphism With Smoking Cessation in Nicotine Replacement Therapy

A Phase 4 interventional study of sublingual nicotine in Nicotine Dependence, sponsored by National Institute on Drug Dependence, China. Completed. Open to participants aged 20 Years to 70 Years. Per ClinicalTrials.gov, last updated 2013-11-13.

Sponsored by National Institute on Drug Dependence, China · Phase 4 and Interventional

Phase
Phase 4
Study type
Interventional
Enrollment
250
Allocation
Not applicable
Ages
20 Years to 70 Years
Sex
All
01

Study summary

Nicotine replacement treatment (NRT) can be efficacious for smoking cessation, but used by only a minority of smokers in China. Pharmacogenetic matching may improve treatment outcomes for NRT in subgroups of smokers. The investigators evaluated the efficacy and safety of sublingual nicotine tablets (SNT) for smoking cessation and the association of catechol-O-methyltransferase (COMT) genotype with efficacy in this smoking cessation trial among Chinese smokers.

Read the detailed description

All subjects provided written informed consent after a full explanation of the protocol design.

02

Conditions studied

  • Nicotine Dependence

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03

In context

Tobacco Use Disorder

968 studies on the registry are indexed under Tobacco Use Disorder; 126 are open to participants now.

This study's enrollment of 250 is above the median of 89 across 851 interventional studies indexed under Tobacco Use Disorder.

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Lead sponsor

National Institute on Drug Dependence, China is the lead sponsor of 7 studies on the registry; none are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
20 Years to 70 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Subjects motivated to stop smoking and Han Chinese
  • aged 20-70 years who lived in the Haidian District of Beijing
  • smoke ≥10 cigarettes/day
  • have smoked for ≥3 years
  • carbon monoxide (CO) level ≥10 p.p.m. in exhaled air

Exclusion criteria

Exclusion Criteria:

  • a history of "Diagnostic and Statistical Manual of Mental Disorders-fourth Edition" (DSM-IV) psychiatric disorder
  • alcohol abuse and other drug abuse
  • with pathological changes in the floor of their mouth
  • cardiovascular disease
  • taking psychotropic medications
  • using other forms of tobacco or any other NRT products during the last 6 months
  • pregnant or breast-feeding
05

Study design

Phase
Phase 4
Allocation
Not applicable
Intervention model
Single group
Masking
Double (Investigator, Outcomes assessor)
Enrollment
250 participants (actual)

Study arms

  • Experimental
    sublingual nicotine,placebo

    sublingual nicotine:one or two tablets per hour, up to a maximum of 20 tablets per day Subjects were advised to use the full treatment dose for 4 weeks

    Drug: sublingual nicotine

Interventions

  • Drugsublingual nicotine

    The nicotine sublingual tablet is Smokers were recommended to use one or two tablets per hour, up to a maximum of 20 tablets per day. Subjects were advised to use the full treatment dose for 4 weeks. After this time-point, treatment could be tapered off up to the 8-week visit. During the next 4-week follow-up phase, no further medication was dispensed. Staff, who dispensed medications, were not involved in treating the subjects. During each patient visit, the importance of adequate dosing with study medication was emphasized. The medication was free of charge. In addition, all participants received six sessions of standardized behavioral group counseling focusing on self-monitoring and behavioral modification approaches.

    Also known as: nicotine sublingual tablet

06

What researchers measure

Primary outcomes

  1. Changes in the exhaled carbon monoxide (CO) level during the 12-week study

    Time frame: The first was 1 day before quit day (baseline), followed by visits after 1, 2, 4, 6 and 8 weeks at the end of treatment (EOT), with a final follow-up visit at 12 weeks.

07

Study locations

No study locations are listed for this record.

08

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Nov 13, 2013, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT01980550
Lead sponsor
National Institute on Drug Dependence, China
Collaborators
Bronx VA Medical Center
Responsible party
Sponsor
First posted
Nov 11, 2013
Start date
Mar 2004
Primary completion
Dec 2004
Completion
Dec 2004
Last update
Nov 13, 2013

Study contacts

xiang y zhang, professor
principal investigator · VA Medical Center,USA

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Nov 2013. You cannot join it, but the record below documents what was studied.

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