# Smell Changes & Efficacy of Nasal Theophylline

> **NCT03990766** · PHASE2 · COMPLETED · sponsor: **Washington University School of Medicine** · enrollment: 27 (actual)

## Conditions studied

- Olfactory Disorder
- Anosmia
- Viral Infection
- Theophylline Causing Adverse Effects in Therapeutic Use
- Smell Disorder

## Interventions

- **DRUG:** Theophylline
- **DRUG:** Saline Nasal

## Key facts

- **NCT ID:** NCT03990766
- **Lead sponsor:** Washington University School of Medicine
- **Sponsor class:** OTHER
- **Phase:** PHASE2
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2019-05-15
- **Primary completion:** 2021-01-15
- **Final completion:** 2021-01-15
- **Target enrollment:** 27 (ACTUAL)
- **Last updated:** 2022-03-31


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT03990766

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT03990766, "Smell Changes & Efficacy of Nasal Theophylline". Retrieved via AI Analytics 2026-05-23 from https://api.ai-analytics.org/clinical/NCT03990766. Licensed CC0.

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