# HCQ for Primary Prophylaxis Against COVID19 in Health-care Workers

> **NCT04336748** · PHASE3 · WITHDRAWN · sponsor: **Medical University of Vienna**

## Conditions studied

- Sars-CoV2
- Infection Viral
- Healthcare Worker
- Prophylaxis

## Interventions

- **DRUG:** Hydroxychloroquine
- **DRUG:** Placebo

## Key facts

- **NCT ID:** NCT04336748
- **Lead sponsor:** Medical University of Vienna
- **Sponsor class:** OTHER
- **Phase:** PHASE3
- **Study type:** INTERVENTIONAL
- **Status:** WITHDRAWN
- **Start date:** 2020-04
- **Primary completion:** 2020-07
- **Final completion:** 2020-08
- **Target enrollment:** 0 (ACTUAL)
- **Why stopped:** Not feasible
- **Last updated:** 2022-04-12


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04336748

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04336748, "HCQ for Primary Prophylaxis Against COVID19 in Health-care Workers". Retrieved via AI Analytics 2026-06-08 from https://api.ai-analytics.org/clinical/NCT04336748. Licensed CC0.

---

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