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Hydroxychloroquine Chemoprophylaxis in Healthcare Personnel in Contact With COVID-19 Patients (PHYDRA Trial)

Chemoprophylaxis With Hydroxychloroquine in Healthcare Personnel in Contact With COVID-19 Patients: A Randomized Controlled Trial (PHYDRA Trial)

Status
Completed
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT04318015
Acronym
PHYDRA
Enrollment
289
Registered
2020-03-23
Start date
2020-04-14
Completion date
2021-03-31
Last updated
2022-02-01

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

COVID-19, Severe Acute Respiratory Syndrome

Brief summary

Triple blinded, phase III randomized controlled trial with parallel groups (200mg of hydroxychloroquine per day vs. placebo) aiming to prove hydroxychloroquine's security and efficacy as prophylaxis treatment for healthcare personnel exposed to COVID-19 patients.

Detailed description

Healthcare personnel infection with COVID-19 is a major setback in epidemiological emergencies. Hydroxychloroquine has proven to inhibit coronavirus in-vitro but no data to date has proven in-vivo effects. Nevertheless, hydroxychloroquine is a low cost, limited toxicity and broadly used agent. Since there is currently no treatment for COVID-19 exposure prophylaxis, the investigators will implement a triple blinded, phase III randomized controlled trial with parallel groups (200mg of hydroxychloroquine per day vs. placebo) for 60 days.

Interventions

DRUGHydroxychloroquine

All treatment will be administered orally.

DRUGPlacebo oral tablet

All placebo will be administered orally

Sponsors

National Institute of Respiratory Diseases, Mexico
Lead SponsorOTHER_GOV

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)

Masking description

Randomization will happen after previous assignment of recruited individual to high-risk or low-risk exposure according to he or her activities. An independent member of the team will randomly assign treatment or placebo following a computer based program. Blinding will end in case elimination criteria are met.

Intervention model description

Triple blinded, randomized controlled trial

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
Yes

Inclusion criteria

* 18 years old upon study start * Healthcare personnel exposed to patients with COVID-19 respiratory disease: physicians, nurses, chemists, pharmacists, janitors, stretcher-bearer, administrative and respiratory therapists. * Signed consent for randomization to any study arm.

Exclusion criteria

* Known hypersensitivity to hydroxychloroquine manifested as anaphylaxis * Current treatment to chloroquine or hydroxychloroquine * Women with last menstruation date farther than a month without negative pregnancy test. * Women with positive pregnancy test * Breastfeeding women * Chronic hepatic disease history (Child-Pugh B or C) * Chronic renal disease (GFR less or equal to 30)

Design outcomes

Primary

MeasureTime frameDescription
Symptomatic COVID-19 infection rateFrom date of randomization until the appearance of symptoms or study completion 60 days after treatment startSymptomatic infection rate by COVID-19 defined as cough, dyspnea, fever, myalgia, arthralgias or rhinorrhea along with a positive COVID-19 real-time polymerase chain reaction test.

Secondary

MeasureTime frameDescription
Symptomatic non-COVID viral infection rateFrom date of randomization until the appearance of symptoms or study completion 60 days after treatment startSymptomatic infection rate by other non-COVID-19 viral etiologies defined as cough, dyspnea, fever, myalgia, arthralgias or rhinorrhea along with a positive viral real time polymerase chain reaction test.
Days of labor absenteeismFrom date of randomization until study completion 60 days after treatment startNumber of days absent from labor due to COVID-19 symptomatic infection
Rate of labor absenteeismFrom date of randomization until study completion 60 days after treatment startAbsenteeism from labor rate due to COVID-19 symptomatic infection
Rate of severe respiratory COVID-19 disease in healthcare personnelFrom date of randomization until the appearance of symptoms or study completion 60 days after treatment startRate of severe respiratory COVID-19 disease in healthcare personnel

Countries

Mexico

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026