# Smell in Covid-19 and Efficacy of Nasal Theophylline

> **NCT04789499** · PHASE2 · COMPLETED · sponsor: **Washington University School of Medicine** · enrollment: 51 (actual)

## Conditions studied

- Covid19
- Anosmia
- Olfactory Disorder
- Covid-19 Pandemic
- SARS-CoV-2 Infection
- Hyposmia
- Ageusia
- Hypogeusia

## Interventions

- **DRUG:** Theophylline Powder
- **DRUG:** Placebo Comparator

## Key facts

- **NCT ID:** NCT04789499
- **Lead sponsor:** Washington University School of Medicine
- **Sponsor class:** OTHER
- **Phase:** PHASE2
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2021-03-15
- **Primary completion:** 2021-12-30
- **Final completion:** 2021-12-30
- **Target enrollment:** 51 (ACTUAL)
- **Last updated:** 2023-05-24


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04789499

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04789499, "Smell in Covid-19 and Efficacy of Nasal Theophylline". Retrieved via AI Analytics 2026-05-28 from https://api.ai-analytics.org/clinical/NCT04789499. Licensed CC0.

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