# The Effect of Ganglion Sphenopalatine Block Versus Placebo on Persistent Headache Following COVID-19 Infection

> **NCT04636034** · PHASE3 · TERMINATED · sponsor: **University Hospital Bispebjerg and Frederiksberg** · enrollment: 18 (actual)

## Conditions studied

- Headache
- Covid19
- Sphenopalatine Ganglion Block
- Persistent Headache Following COVID-19

## Interventions

- **PROCEDURE:** Sphenopalatine Ganglion Block with Local Anesthetic
- **PROCEDURE:** Sphenopalatine Ganglion Block with Placebo (Isotone NaCl)
- **PROCEDURE:** "Sham"-block with Placebo (Isotone NaCl)

## Key facts

- **NCT ID:** NCT04636034
- **Lead sponsor:** University Hospital Bispebjerg and Frederiksberg
- **Sponsor class:** OTHER
- **Phase:** PHASE3
- **Study type:** INTERVENTIONAL
- **Status:** TERMINATED
- **Start date:** 2021-01-12
- **Primary completion:** 2022-06-06
- **Final completion:** 2022-06-06
- **Target enrollment:** 18 (ACTUAL)
- **Why stopped:** Recruitment failure
- **Last updated:** 2022-06-10


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04636034

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04636034, "The Effect of Ganglion Sphenopalatine Block Versus Placebo on Persistent Headache Following COVID-19 Infection". Retrieved via AI Analytics 2026-06-02 from https://api.ai-analytics.org/clinical/NCT04636034. Licensed CC0.

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