# N-Acetylcysteine for Smoking Cessation in Tobacco and Cannabis Co-Use

> **NCT04627922** · PHASE4 · COMPLETED · sponsor: **Ellen Herbst** · enrollment: 59 (actual)

## Conditions studied

- Cannabis Use
- Tobacco Use Disorder
- Drug Use Disorder

## Interventions

- **DRUG:** N-Acetyl cysteine
- **OTHER:** Placebo comparator
- **BEHAVIORAL:** Cognitive behavioral therapy (CBT)

## Key facts

- **NCT ID:** NCT04627922
- **Lead sponsor:** Ellen Herbst
- **Sponsor class:** OTHER
- **Phase:** PHASE4
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2021-08-25
- **Primary completion:** 2025-06-30
- **Final completion:** 2025-06-30
- **Target enrollment:** 59 (ACTUAL)
- **Last updated:** 2026-03-20

## Collaborators

- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04627922

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04627922, "N-Acetylcysteine for Smoking Cessation in Tobacco and Cannabis Co-Use". Retrieved via AI Analytics 2026-08-02 from https://api.ai-analytics.org/clinical/NCT04627922. Licensed CC0.

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