Concentration Impact Nicotine Salt

NCT ID: NCT04725656

Last Updated: 2025-03-28

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Clinical Phase

NA

Total Enrollment

312 participants

Study Classification

INTERVENTIONAL

Study Start Date

2024-01-30

Study Completion Date

2025-12-31

Brief Summary

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Double-blind (for the two active arms), randomized, three-arm (two active and one control) clinical trial investigating factors (e.g. nicotine concentration) influencing the success of smoking cessation strategies and possible health risks related to nicotine salt vaping.

Detailed Description

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At the clinic screening visit demographics, smoking (including the Fagerström Test for Cigarette Dependence (FTCD) Questionnaire) and medical history, concomitant medication, vital signs, body mass index (BMI) and exhaled carbon monoxide (CO) will be assessed, and a physical examination will be performed. Saliva samples will be collected for cotinine and nicotine metabolite ratio (NMR) measurement, urine samples for urinary anabasine, 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanol (NNAL), nicotine metabolites, tobacco-specific nitrosamines (TSNA), and VOC, and blood samples for genotyping, steroid levels, blood lipids, creatinine, and glucose.

After randomization the open system vape device and the nicotine salt e-liquids will be distributed to the participants of the two active arms. Use of e-liquids in the active arms will be ad libitum during three months and will be monitored by returned empty e-liquid bottles.

All groups will receive smoking cessation counseling at baseline, week 1, and week 4. Visits at the center at baseline, week 4, and 3 months will include questionnaires regarding TC and EC use, respiratory symptoms, liking, and adverse events, measurement of heart rate, blood pressure, BMI, blood steroid levels, HDL, LDL, creatinine and glucose, and measurement of urinary TSNA, VOC and nicotine metabolites. For participants self-reporting TC abstinence, exhaled CO validation and urinary anabasine and NNAL will be collected to verify tobacco abstinence.

A follow-up visit also assessing TC abstinence will take place at 6 months.

Conditions

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Smoking Cessation Vaping

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

PREVENTION

Blinding Strategy

QUADRUPLE

Participants Caregivers Investigators Outcome Assessors

Study Groups

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Active arm, low concentration (18 mg/mL) nicotine salt e-liquids

Group Type ACTIVE_COMPARATOR

Smoking cessation counseling

Intervention Type PROCEDURE

Smoking cessation counseling at baseline, week 1, and week 4.

Open system vape device and nicotine salt e-liquids

Intervention Type OTHER

Ad libitum use of nicotine salt e-liquids during three months.

Active arm, high concentration (59 mg/mL) nicotine salt e-liquids

Group Type ACTIVE_COMPARATOR

Smoking cessation counseling

Intervention Type PROCEDURE

Smoking cessation counseling at baseline, week 1, and week 4.

Open system vape device and nicotine salt e-liquids

Intervention Type OTHER

Ad libitum use of nicotine salt e-liquids during three months.

Control group

Receive only smoking cessation counseling

Group Type OTHER

Smoking cessation counseling

Intervention Type PROCEDURE

Smoking cessation counseling at baseline, week 1, and week 4.

Interventions

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Smoking cessation counseling

Smoking cessation counseling at baseline, week 1, and week 4.

Intervention Type PROCEDURE

Open system vape device and nicotine salt e-liquids

Ad libitum use of nicotine salt e-liquids during three months.

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

* Adult (≥ 18 years old) smokers (at least 5 TC per day for at least 12 months)
* Motivated to quit smoking as evidenced by signing the informed consent form at trial enrolment specifying that a target quit date will be set
* Exhaled CO ≥ 10 ppm or saliva cotinine of \> 30 ng/ml (in case of borderline CO measurement of 6-10 ppm) at screening
* Willing to participate in the trial even if allocated to the control group
* Ability to communicate well with the investigator and to understand and comply with the requirements of the study
* Signed informed consent form

Exclusion Criteria

* Known hypersensitivity/allergy to a content of the e-liquid
* Pregnancy or breast feeding
* Intention to become pregnant during the course of the study
* Current regular use of EC or tobacco heating systems
* Use of NRT, varenicline, or bupropion in the month prior to the screening visit
* People who smoke tobacco combined with marijuana and do not currently want to quit marijuana use
* Participation in an interventional trial within 30 days prior to the screening visit
* Legal incapacity or limited legal capacity at screening
* Any circumstances or conditions, which, in the opinion of the investigator, may affect full participation in the study or compliance with the protocol
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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Swiss National Science Foundation

OTHER

Sponsor Role collaborator

Insel Gruppe AG, University Hospital Bern

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Evangelia Liakoni, MD

Role: PRINCIPAL_INVESTIGATOR

Inselspital, Bern University Hospital

Locations

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Inselspital

Bern, , Switzerland

Site Status RECRUITING

Countries

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Switzerland

Central Contacts

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Evangelia Liakoni, MD

Role: CONTACT

0041316325461

Facility Contacts

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Evangelia Liakoni, MD

Role: primary

+41 31 632 5461

Other Identifiers

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BASEC-ID: 2020-01875

Identifier Type: -

Identifier Source: org_study_id

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