# Smell in COVID-19 and Efficacy of Nasal Theophylline (SCENT 3)

> **NCT05947643** · PHASE2 · COMPLETED · sponsor: **Washington University School of Medicine** · enrollment: 77 (actual)

## Conditions studied

- COVID-19

## Interventions

- **DRUG:** theophylline
- **DRUG:** Placebo

## Key facts

- **NCT ID:** NCT05947643
- **Lead sponsor:** Washington University School of Medicine
- **Sponsor class:** OTHER
- **Phase:** PHASE2
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2022-11-22
- **Primary completion:** 2025-04-24
- **Final completion:** 2025-08-04
- **Target enrollment:** 77 (ACTUAL)
- **Last updated:** 2025-08-20


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT05947643

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT05947643, "Smell in COVID-19 and Efficacy of Nasal Theophylline (SCENT 3)". Retrieved via AI Analytics 2026-05-25 from https://api.ai-analytics.org/clinical/NCT05947643. Licensed CC0.

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*[Clinical trials dataset](/datasets/clinical-trials) · CC0 1.0*