# Efficacy of SLN Block for Chronic Cough

> **NCT04421092** · PHASE3 · COMPLETED · sponsor: **Medical University of South Carolina** · enrollment: 17 (actual)

## Conditions studied

- Cough
- Superior Laryngeal Nerve Block
- Neurogenic Cough

## Interventions

- **PROCEDURE:** Superior laryngeal nerve block
- **PROCEDURE:** Injection of placebo (saline)
- **PROCEDURE:** Injection of steroid-lidocaine mixture

## Key facts

- **NCT ID:** NCT04421092
- **Lead sponsor:** Medical University of South Carolina
- **Sponsor class:** OTHER
- **Phase:** PHASE3
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2020-07-22
- **Primary completion:** 2022-12-30
- **Final completion:** 2022-12-30
- **Target enrollment:** 17 (ACTUAL)
- **Last updated:** 2025-10-23


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04421092

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04421092, "Efficacy of SLN Block for Chronic Cough". Retrieved via AI Analytics 2026-05-25 from https://api.ai-analytics.org/clinical/NCT04421092. Licensed CC0.

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