Hydroxychloroquine as Prophylaxis for COVID-19 in Healthcare Workers (HCQPreP)
Hydroxychloroquine as Primary Prophylaxis for COVID-19 in Healthcare Workers (HCQPreP)
  • Phase

    Phase 3
  • Study Type

  • Status

    Unknown status
  • Study Participants

This a double-blind, randomized, placebo-controlled clinical trial to determine if primary prophylaxis with hydroxychloroquine in healthcare workers reduces symptomatic COVID-19 infection. Healthcare workers will be randomized at a 1:1 allocation between intervention and placebo arms and followed for 12 weeks. This study will enroll up to 1,700 participates in Lafayette, Louisiana. The primary outcome will number of symptomatic COVID-19 infections. Secondary endpoints included number of days healthcare workers are absent from work and rate of severe infection.
The study is a double blind placebo controlled at two hospitals in Lafayette, Louisiana aiming to enroll 1700 participants with a 1:1 randomization. The HCQ dose in 400mg twice on day 1, then 200mg twice weekly. The primary outcome variable is development of symptomatic COVID-19 infection. The secondary objectives are number of days absent from work due to symptomatic COVID-19 infection and rate of severe disease due to COVID-19 (hypoxia in setting of >50% lung involvement on chest imaging, respiratory failure, shock or end-organ damage). The study will enroll participants for four weeks with and plan to treat with hydroxychloroquine versus placebo for a total of 12 weeks.
Study Started
Apr 27
Primary Completion
Mar 31
Study Completion
Jun 01
Last Update
Sep 02

Drug Hydroxychloroquine

Hydroxychloroquine loading 400mg (2 capsules) twice 12 hours apart followed by 200mg (1 capsule) twice weekly

  • Other names: HCQ PreP

Drug Placebo

Loading dose of two placebo capsules twice 12 hours apart followed by 1 capsule twice weekly

Hydroxychloroquine Experimental

Hydroxychloroquine loading dose will be given as 400mg for two doses 12 hours apart. This will then be followed by maintenance dosing of 200mg twice weekly for the remainder of the trial.

Placebo Placebo Comparator

An identical placebo will be administered on an identical dosing interval and frequency.


Inclusion Criteria:

Age ≥ 18 years
Healthcare or Hospital Worker who has direct patient contact
Willing to participate in the research.
Able to understand and sign the informed consent form

Exclusion Criteria:

Age < 18 years
History of ventricular arrhythmia or use of Class IA, IC and III anti-arrhythmics
Known prolonged QTc interval
History of retinal disease
Kidney failure with GFR <10%
Chronic hepatic disease w/ Child-Pugh class B or C
Hypersensitivity to chloroquine or hydroxychloroquine
Currently taking chloroquine or hydroxychloroquine
Unwilling to participate
Unable to understand and/or sign the informed consent form.
No Results Posted