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CompletedNCT04627467TS-COVIDUpdated Oct 7, 2021

Prevention With Chloroquine in Health Personnel Exposed to Infection With Coronavirus Disease 2019 (COVID-19) (TS-COVID)

A Phase 2 interventional study of Chloroquine in Covid19, sponsored by Fundacion Clinica Valle del Lili. Completed at 1 site in Colombia. Open to participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2021-10-07.

Sponsored by Fundacion Clinica Valle del Lili · Phase 2, Interventional, and Prevention

From the registry’s dates

  • Registered 7 months after the study started (first participant enrolled Mar 2020, registered Oct 2020).
Phase
Phase 2
Study type
Interventional
Enrollment
3,217
Allocation
Not applicable
Ages
18 Years and older
Sex
All
01

Study summary

The purpose of this study is to assess the efficacy and safety of chloroquine prophylaxis on the incidence of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) infections in healthcare workers exposed to patients with confirmed Coronavirus Disease 2019 (COVID-19)

Read the detailed description

Single arm study in which healthcare workers were actively invited to participate. Possible participants were asked to complete a questionnaire to determine eligibility for study entry and to identify risk factors for infection, severe infection, or adverse events associated with chloroquine use.

Volunteers who meet the eligibility requirements received chloroquine 150mg base at days 0, 15, 30, 45, 60, 75. Cumulative incidence and incidence rate of COVID-19 at days 30,60 and 90 were calculated. Presence of Immunoglobulin G (IgG) antibodies against SARS-Cov-2 was evaluated at the beginning, at the end and at any moment if they become infected with this virus.

In addition, patients were asked to complete a survey evaluating adverse effects and COVID-19 symptoms at day 0 and weeks 2,4,6,8,10, and 12.

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Conditions studied

  • Covid19

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Keywords

  • Chloroquine
  • COVID-19
  • SARS-CoV-2
  • Antibodies
  • Prophylaxis
  • Healthcare workers
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In context

COVID-19

7,641 studies on the registry are indexed under COVID-19; 487 are open to participants now.

This study's enrollment of 3,217 is above the median of 100 across 4,100 interventional studies indexed under COVID-19.

Browse COVID-19 studies →

Lead sponsor

Fundacion Clinica Valle del Lili is the lead sponsor of 23 studies on the registry; 7 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
Yes

Inclusion criteria

  • Asymptomatic healthcare workers and contractors who work in Fundacion Valle del Lili

Exclusion criteria

Exclusion Criteria:

  • To have two or more of the following symptoms 14 days previous to the initial assessment: cough, dyspnea, odynophagia, fatigue, weakness, fever >38 degrees °C
  • History of close contact (less than two meters) with a person with probable or confirmed COVID-19 without adequate protection during the last 14 days
  • History of one the following diseases in treatment at inclusion in the study: cardiac arrhythmias, epilepsy, kidney disease, seizures
  • Treatment with concomitant medications: tamoxifen, quinine, cyclosporine, amiodarone, digoxine, anticonvulsivants
  • Having recently taken chloroquine or hydroxychloroquine in the last two weeks
  • Known hypersensitivity to chloroquine or hydroxychloroquine
05

Study design

Phase
Phase 2
Primary purpose
Prevention
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
3,217 participants (actual)

Study arms

  • Experimental
    Chloroquine 150mg base

    Volunteers received chloroquine tablets orally at days 0, 15, 30, 45, 60 and 75.

    Drug: Chloroquine

Interventions

  • DrugChloroquine

    250mg tablet (150mg base chloroquine)

06

What researchers measure

Primary outcomes

  1. COVID-19 infection

    Symptomatic COVID-19 infection confirmed by reverse transcriptase polymerase chain reaction in healthcare workers, in any respiratory sample

    Time frame: Day 15

  2. COVID-19 infection

    Symptomatic COVID-19 infection confirmed by reverse transcriptase polymerase chain reaction in healthcare workers, in any respiratory sample

    Time frame: Day 30

  3. COVID-19 infection

    Symptomatic COVID-19 infection confirmed by reverse transcriptase polymerase chain reaction in healthcare workers, in any respiratory sample

    Time frame: Day 45

  4. COVID-19 infection

    Symptomatic COVID-19 infection confirmed by reverse transcriptase polymerase chain reaction in healthcare workers, in any respiratory sample

    Time frame: Day 60

  5. COVID-19 infection

    Symptomatic COVID-19 infection confirmed by reverse transcriptase polymerase chain reaction in healthcare workers, in any respiratory sample

    Time frame: Day 75

  6. COVID-19 infection

    Symptomatic COVID-19 infection confirmed by reverse transcriptase polymerase chain reaction in healthcare workers, in any respiratory sample

    Time frame: Day 90

Secondary outcomes

  1. IgG antibodies seropositivity against SARS-CoV-2

    Number of participants with IgG antibodies seropositivity against SARS-CoV-2 in the final sample.

    Time frame: Day 90

Other outcomes

  1. Adverse drug event

    Number of participants with at least one adverse drug event

    Time frame: Day 15, day 30, day 45, day 60, day 75 and day 90

  2. Unexpected adverse events

    Number of participants with unexpected adverse events

    Time frame: Day 15, day 30, day 45, day 60, day 75 and day 90

  3. Participant drop-out

    Number of participants who did not completed prophylaxis because of discontinuing medication, withdrawal of consent, or lost to follow-up

    Time frame: Baseline and day 90

  4. Non-adherence

    Number of participants who were not-adherent to the medication scheme

    Time frame: Baseline and day 90

07

Study locations

1 site
  • Fundacion Valle del Lili
    Cali, Valle Del Cauca 760032, Colombia
08

References and documents

Publications

  • WHO. Coronavirus disease 2019 (COVID-19). Situation Report - 43 2020 [Available from: https://www.who.int/emergencies/diseases/novel-coronavirus2019/technicalguidance/laboratoryguidance
  • Wang M, Su S, Lv J, Zhou G, Wang Q, Guo C. Analysis of clinical features and prognostic factors in Chinese patients with rheumatic diseases in an intensive care unit. The Egyptian Rheumatologist. 2018;40(1):63-6.
  • Livingston E, Bucher K. Coronavirus Disease 2019 (COVID-19) in Italy. JAMA. 2020 Apr 14;323(14):1335. doi: 10.1001/jama.2020.4344. No abstract available. PubMed 32181795 ↗
  • Wang M, Cao R, Zhang L, Yang X, Liu J, Xu M, Shi Z, Hu Z, Zhong W, Xiao G. Remdesivir and chloroquine effectively inhibit the recently emerged novel coronavirus (2019-nCoV) in vitro. Cell Res. 2020 Mar;30(3):269-271. doi: 10.1038/s41422-020-0282-0. Epub 2020 Feb 4. No abstract available. PubMed 32020029 ↗
  • Gautret P, Lagier JC, Parola P, Hoang VT, Meddeb L, Mailhe M, Doudier B, Courjon J, Giordanengo V, Vieira VE, Tissot Dupont H, Honore S, Colson P, Chabriere E, La Scola B, Rolain JM, Brouqui P, Raoult D. RETRACTED: Hydroxychloroquine and azithromycin as a treatment of COVID-19: results of an open-label non-randomized clinical trial. Int J Antimicrob Agents. 2020 Jul;56(1):105949. doi: 10.1016/j.ijantimicag.2020.105949. Epub 2020 Mar 20. PubMed 32205204 ↗
  • Zhou D, Dai SM, Tong Q. COVID-19: a recommendation to examine the effect of hydroxychloroquine in preventing infection and progression. J Antimicrob Chemother. 2020 Jul 1;75(7):1667-1670. doi: 10.1093/jac/dkaa114. PubMed 32196083 ↗
  • Rodriguez-Morales AJ, Cardona-Ospina JA, Gutierrez-Ocampo E, Villamizar-Pena R, Holguin-Rivera Y, Escalera-Antezana JP, Alvarado-Arnez LE, Bonilla-Aldana DK, Franco-Paredes C, Henao-Martinez AF, Paniz-Mondolfi A, Lagos-Grisales GJ, Ramirez-Vallejo E, Suarez JA, Zambrano LI, Villamil-Gomez WE, Balbin-Ramon GJ, Rabaan AA, Harapan H, Dhama K, Nishiura H, Kataoka H, Ahmad T, Sah R; Latin American Network of Coronavirus Disease 2019-COVID-19 Research (LANCOVID-19). Electronic address: https://www.lancovid.org. Clinical, laboratory and imaging features of COVID-19: A systematic review and meta-analysis. Travel Med Infect Dis. 2020 Mar-Apr;34:101623. doi: 10.1016/j.tmaid.2020.101623. Epub 2020 Mar 13. PubMed 32179124 ↗
  • Xu X, Yu C, Qu J, Zhang L, Jiang S, Huang D, Chen B, Zhang Z, Guan W, Ling Z, Jiang R, Hu T, Ding Y, Lin L, Gan Q, Luo L, Tang X, Liu J. Imaging and clinical features of patients with 2019 novel coronavirus SARS-CoV-2. Eur J Nucl Med Mol Imaging. 2020 May;47(5):1275-1280. doi: 10.1007/s00259-020-04735-9. Epub 2020 Feb 28. PubMed 32107577 ↗
  • Huang C, Wang Y, Li X, Ren L, Zhao J, Hu Y, Zhang L, Fan G, Xu J, Gu X, Cheng Z, Yu T, Xia J, Wei Y, Wu W, Xie X, Yin W, Li H, Liu M, Xiao Y, Gao H, Guo L, Xie J, Wang G, Jiang R, Gao Z, Jin Q, Wang J, Cao B. Clinical features of patients infected with 2019 novel coronavirus in Wuhan, China. Lancet. 2020 Feb 15;395(10223):497-506. doi: 10.1016/S0140-6736(20)30183-5. Epub 2020 Jan 24. Erratum In: Lancet. 2020 Feb 15;395(10223):496. doi: 10.1016/S0140-6736(20)30252-X. PubMed 31986264 ↗
  • Gostic K, Gomez AC, Mummah RO, Kucharski AJ, Lloyd-Smith JO. Estimated effectiveness of symptom and risk screening to prevent the spread of COVID-19. Elife. 2020 Feb 24;9:e55570. doi: 10.7554/eLife.55570. PubMed 32091395 ↗
  • Chowell G, Abdirizak F, Lee S, Lee J, Jung E, Nishiura H, Viboud C. Transmission characteristics of MERS and SARS in the healthcare setting: a comparative study. BMC Med. 2015 Sep 3;13:210. doi: 10.1186/s12916-015-0450-0. PubMed 26336062 ↗
  • Epidemiology Working Group for NCIP Epidemic Response, Chinese Center for Disease Control and Prevention. [The epidemiological characteristics of an outbreak of 2019 novel coronavirus diseases (COVID-19) in China]. Zhonghua Liu Xing Bing Xue Za Zhi. 2020 Feb 10;41(2):145-151. doi: 10.3760/cma.j.issn.0254-6450.2020.02.003. Chinese. PubMed 32064853 ↗
  • Su A. Doctors and nurses fighting coronavirus in China die of both infection and fatigue. Los Angeles Times. 2020.
  • Liu M, He P, Liu HG, Wang XJ, Li FJ, Chen S, Lin J, Chen P, Liu JH, Li CH. [Clinical characteristics of 30 medical workers infected with new coronavirus pneumonia]. Zhonghua Jie He He Hu Xi Za Zhi. 2020 Feb 17;43(0):E016. doi: 10.3760/cma.j.issn.1001-0939.2020.0016. Online ahead of print. Chinese. PubMed 32062957 ↗
  • Mitja O, Clotet B. Use of antiviral drugs to reduce COVID-19 transmission. Lancet Glob Health. 2020 May;8(5):e639-e640. doi: 10.1016/S2214-109X(20)30114-5. Epub 2020 Mar 19. No abstract available. PubMed 32199468 ↗
  • Welliver R, Monto AS, Carewicz O, Schatteman E, Hassman M, Hedrick J, Jackson HC, Huson L, Ward P, Oxford JS; Oseltamivir Post Exposure Prophylaxis Investigator Group. Effectiveness of oseltamivir in preventing influenza in household contacts: a randomized controlled trial. JAMA. 2001 Feb 14;285(6):748-54. doi: 10.1001/jama.285.6.748. PubMed 11176912 ↗
  • Hydroxychloroquine Chemoprophylaxis in Healthcare Personnel in Contact With COVID-19 Patients (PHYDRA Trial) - Full Text View. ClinicalTrials.gov.
  • Chloroquine Prevention of Coronavirus Disease (COVID-19) in the Healthcare Setting - Full Text View. ClinicalTrials.gov
  • Treatment of COVID-19 Cases and Chemoprophylaxis of Contacts as Prevention - Full Text View. ClinicalTrials.gov
  • Ruiz-Irastorza G, Ramos-Casals M, Brito-Zeron P, Khamashta MA. Clinical efficacy and side effects of antimalarials in systemic lupus erythematosus: a systematic review. Ann Rheum Dis. 2010 Jan;69(1):20-8. doi: 10.1136/ard.2008.101766. PubMed 19103632 ↗
  • Kuznik A, Bencina M, Svajger U, Jeras M, Rozman B, Jerala R. Mechanism of endosomal TLR inhibition by antimalarial drugs and imidazoquinolines. J Immunol. 2011 Apr 15;186(8):4794-804. doi: 10.4049/jimmunol.1000702. Epub 2011 Mar 11. PubMed 21398612 ↗
  • Savarino A, Boelaert JR, Cassone A, Majori G, Cauda R. Effects of chloroquine on viral infections: an old drug against today's diseases? Lancet Infect Dis. 2003 Nov;3(11):722-7. doi: 10.1016/s1473-3099(03)00806-5. PubMed 14592603 ↗
  • Yan Y, Zou Z, Sun Y, Li X, Xu KF, Wei Y, Jin N, Jiang C. Anti-malaria drug chloroquine is highly effective in treating avian influenza A H5N1 virus infection in an animal model. Cell Res. 2013 Feb;23(2):300-2. doi: 10.1038/cr.2012.165. Epub 2012 Dec 4. No abstract available. PubMed 23208422 ↗
  • IDOATE A, IDOIPE Á. 2.4. Investigación y ensayos clínicos.
  • Schwartz E. Prophylaxis of malaria. Mediterr J Hematol Infect Dis. 2012;4(1):e2012045. doi: 10.4084/MJHID.2012.45. Epub 2012 Jun 29. PubMed 22811794 ↗
  • Gozal D, Hengy C, Fadat G. Prolonged malaria prophylaxis with chloroquine and proguanil (chloroguanide) in a nonimmune resident population of an endemic area with a high prevalence of chloroquine resistance. Antimicrob Agents Chemother. 1991 Feb;35(2):373-6. doi: 10.1128/AAC.35.2.373. PubMed 2024970 ↗
  • Yao X, Ye F, Zhang M, Cui C, Huang B, Niu P, Liu X, Zhao L, Dong E, Song C, Zhan S, Lu R, Li H, Tan W, Liu D. In Vitro Antiviral Activity and Projection of Optimized Dosing Design of Hydroxychloroquine for the Treatment of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2). Clin Infect Dis. 2020 Jul 28;71(15):732-739. doi: 10.1093/cid/ciaa237. PubMed 32150618 ↗
  • Chen W, Huang Y. To Protect Health Care Workers Better, To Save More Lives With COVID-19. Anesth Analg. 2020 Jul;131(1):97-101. doi: 10.1213/ANE.0000000000004834. PubMed 32541583 ↗

Individual participant data

Plan to share: No — We do not plan to share IPD, since we are not allowed to share information concerning medical history of our patients or health workers.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Oct 7, 2021, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT04627467
Lead sponsor
Fundacion Clinica Valle del Lili
Responsible party
Sponsor
First posted
Nov 13, 2020
Start date
Mar 28, 2020
Primary completion
Jul 9, 2020
Completion
Sep 30, 2021
Last update
Oct 7, 2021

Study contacts

Juan D Velez, MD
principal investigator · Fundacion Clinica Valle del Lili

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Sep 2020. You cannot join it, but the record below documents what was studied.

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