# A Study of Hydroxychloroquine, Vitamin C, Vitamin D, and Zinc for the Prevention of COVID-19 Infection

> **NCT04335084** · PHASE2 · COMPLETED · sponsor: **ProgenaBiome** · enrollment: 254 (actual)

## Conditions studied

- COVID-19
- Coronavirus Infection
- Sars-CoV2
- Corona Virus Infection
- COVID
- Coronavirus
- Coronavirus-19
- Coronavirus 19

## Interventions

- **DRUG:** Hydroxychloroquine
- **DIETARY_SUPPLEMENT:** Vitamin C
- **DIETARY_SUPPLEMENT:** Vitamin D
- **DIETARY_SUPPLEMENT:** Zinc

## Key facts

- **NCT ID:** NCT04335084
- **Lead sponsor:** ProgenaBiome
- **Sponsor class:** OTHER
- **Phase:** PHASE2
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2020-06-22
- **Primary completion:** 2022-05-31
- **Final completion:** 2024-04-11
- **Target enrollment:** 254 (ACTUAL)
- **Last updated:** 2025-06-05

## Collaborators

- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04335084

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04335084, "A Study of Hydroxychloroquine, Vitamin C, Vitamin D, and Zinc for the Prevention of COVID-19 Infection". Retrieved via AI Analytics 2026-05-28 from https://api.ai-analytics.org/clinical/NCT04335084. Licensed CC0.

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