Nerve block may fix COVID smell problems, study says

NCT ID NCT06253806

Completed Symptom relief Sponsor: Washington University School of Medicine Source: ClinicalTrials.gov ↗

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study tested whether a stellate ganglion block (an injection near nerves in the neck) can improve distorted sense of smell (parosmia) caused by COVID-19. 48 adults with long-term smell issues after COVID took part. Half received the nerve block, half got a placebo (saline). The goal was to see if the treatment improves smell-related quality of life.

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Conditions

The condition(s) this trial relates to.

anosmia Coronavinae infectious disease Coronaviridae Infections COVID-19 Infections long COVID-19 lung disorder nervous system disorder Neurologic Manifestations Nidovirales infectious disease pneumonia respiratory system disorder respiratory tract infectious disorder RNA Virus Infections Sensation Disorders viral infectious disease viral pneumonia

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

COVID-19-INDUCED PAROSMIA

Contacts and locations

Locations

Nyssa Fox Farrell

St Louis, Missouri, 63122, United States