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Comparative Effectiveness of Cystine Versus Nicotine Replacement Therapy

Comparative Effectiveness of Cystine Versus Nicotine Replacement Therapy (NRT) in the National Smoking Cessation Program of Mongolia: A Pragmatic Non-Inferiority Trial

Status
Completed
Phases
Phase 4
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT04126135
Enrollment
1307
Registered
2019-10-15
Start date
2022-01-27
Completion date
2024-04-20
Last updated
2024-09-19

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Nicotine Addiction

Keywords

Smoking Cessation, Nicotine Replacement Therapy, Cytisine

Brief summary

A pragmatic, single blinded, randomized, controlled non-inferiority trial of Cytisine versus Nicotine Replacement Therapy for continuous abstinence is conducted in the government run primary health hospitals in Mongolia.

Detailed description

Rationale: In Mongolia, smoking cessation assistance in the governmental health sector consists of behavioral counseling and a 3-week regimen of the NRT patch that costs 175 USD. This cost for low income adults limits effectiveness. A 2014 study documented the superiority and lower cost (\<20 USD) of Cytisine versus NRT for continuous abstinence. Trial investigators are testing the comparative effectiveness of Cytisine in the real life setting of their national health care system and, if proven effective, will include coverage for Cytisine in the national health plan. Research Question/Objective: To determine whether a 25 day course of Cytisine tablets is at least as effective as 25 days of NRT in helping smokers remain abstinent for at least one month. Design: A pragmatic, single blinded, randomized, controlled non-inferiority trial. Setting: Six governmental primary care centers in Ulaanbaatar, Mongolia, and outskirts. Participants: Mongolian adult smokers referred to government-run addiction units. Intervention and procedures: Participants are randomized to 5 weeks of treatment (n=654) or usual care (n=653) and a 6-month follow-up. The treatment consists of a 25-day course of Cytisine tablets and behavioral counseling. Usual care consists of 25 days of NRT and behavioral counseling. Measurements: The primary outcome is continuous abstinence (\< 5 cigarettes smoked since quit date) at 1 month. Secondary outcomes include 7-day point prevalence abstinence rates and adverse events.

Interventions

DRUGCytisine

Subjects will take a 25-day course of Cytisine tablets started during the 4 days before the quit date. They will be asked to reduce smoking during this time.

DRUGNicotine Replacement Therapy (NRT)

Subjects are asked to completely stop smoking on their quit day and use a daily NRT patch for 25 days.

Sponsors

Pfizer
CollaboratorINDUSTRY
Mongolian National University of Medical Sciences
CollaboratorOTHER
Loma Linda University
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
SINGLE (Investigator)

Eligibility

Sex/Gender
ALL
Age
18 Years to 100 Years
Healthy volunteers
No

Inclusion criteria

* Seeking smoking cessation treatment * Ages 18 years or older * Currently smoking \> 5 cigarettes per day * Willingness to make quit attempt with pharmacotherapy * Able to provide verbal and written informed consent * Have telephone access

Exclusion criteria

* Pregnancy or currently breastfeeding * Current users of NRT (patch, gum, lozenge) * Current users of non\_NRT smoking cessation pharmacotherapy * Enrolled in another smoking cessation program (non-governmental) * Clinical disorder that contraindicates use of NRT or Cytisine (heart attack, stroke, severe angina within the past 2 weeks, uncontrolled hypertension, phaeochromocytoma, severe mental illness)

Design outcomes

Primary

MeasureTime frameDescription
Length of abstinence after 25 day course of Cytisine.One month after quit dateContinuous abstinence is defined as \<5 cigarettes smoked since quit date. Subjects will complete survey to determine number of cigarettes smoked since quit day.

Secondary

MeasureTime frameDescription
Length of abstinence after 25 days of NRTOne month after quit dateContinuous abstinence is defined as \<5 cigarettes smoked since quit date. Subjects will complete survey to determine number of cigarettes smoked since quit day.

Countries

Mongolia

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026