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. 2021 Mar 18;2021(3):CD013881. doi: 10.1002/14651858.CD013881
NCT04412772
Trial name or title A RCT ‐ safety & efficacy of tocilizumab ‐ Tx of severe COVID‐19: ARCHITECTS
Methods RCT, placebo‐controlled, double‐blind study
Date of study: June 2020
Location: USA
Phase 3
Participants Randomised: 300 participants
Inclusion criteria
  • Hospitalised with COVID‐19 pneumonia, based on chest X‐ray or CT scan; AND

  • Evidence of hyperinflammation: IL‐6 > 40pg/mL (if available);OR

  • CRP > 2 mg/dL; OR

  • Ferritin > 2000 ng/mL AND iv. 1 or more of the following:

    • impending need for requiring invasive or non‐invasive mechanical ventilation; OR

    • shock requiring vasopressor (without evidence of bacterial / fungal infection); OR

    • need for ECMO; OR

    • severe, refractor ARDS (PaO2/FiO2< 200 mmHg).


Exclusion criteria
  • Active tuberculosis infection based on history

  • Suspected active bacterial, fungal, viral, or other infection (besides COVID‐19)

  • In the opinion of the investigator, progression to death is imminent and inevitable within the next 24 hours, irrespective of the provision of treatments

  • Have received oral anti‐rejection or immunomodulatory drugs (including tocilizumab) with the past 6 months

  • Participating in other drug clinical trials (participation in COVID‐19 trials allowed)

  • Self‐reported pregnant or breastfeeding

  • Any serious medical condition or abnormality of clinical laboratory tests that, in the investigator's judgment, precludes the patient's safe participation in and completion of the study

  • ALT or AST > 10 x ULN detected within 24 hours at baseline

  • ANC < 1000/mL at baseline

  • Platelet count < 50,000/mL at baseline

Interventions Intervention: tocilizumab (IV, 8 mg/kg for up to max 800 mg, single infusion, 1 additional dose may be given if clinical symptoms worsen)
Control interventions: placebo
Outcomes Primary outcome
  • Clinical status on a 7‐point ordinal scale (up to day 28)


Secondary outcomes
  • Clinical improvement (up to day 28)

  • Mechanical ventilation (up to day 28)

Starting date Study start date: 12 June 2020
Contact information Queen's Medical Centre, Todd Seto, tseto@queens.org
Notes Ongoing