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Table 1 Timeline of key COVID-19 treatment guidelines

From: Factors associated with the speed and scope of diffusion of COVID-19 therapeutics in a nationwide healthcare setting: a mixed-methods investigation

Milestone date

Medication

Type

4 March 2020

Hydroxychloroquine publication: suggesting theoretical benefit

Publication [7]

24 March 2020

Hydroxychloroquine publication: questioning potential for harm

Publication [40]

28 March 2020

Hydroxychloroquine: FDA EUA

EUA [43]

28 March 2020

Tocilizumab: publication of case series

Preprint/Twitter [44]

16 April 2020

Chloroquine: preprint of clinical data suggesting harm

Preprint [14]

21 April 2020

Hydroxychloroquine: NIH treatment guidelines recommend against use in combination with azithromycin

Guidelines [45]

27 April 2020

Sarilumab: press release dropping low-dose arm due to potential harm

Press release [25]

29 April 2020

Remdesivir: press release of ACCT-1 study results

Press release [46]

1 May 2020

Remdesivir: FDA EUA

EUA [19, 37]

12 May 2020

Dexamethasone: NIH treatment guidelines recommend against use of corticosteroids except in acute respiratory distress syndrome

Guidelines

12 May 2020

Hydroxychloroquine: NIH treatment guidelines recommend against use

Guidelines

22 May 2020

Hydroxychloroquine: publication of Surgisphere data in Lancet (later retracted)

Publication [15, 16]

12 May 2020

Remdesivir: NIH treatment guidelines recommend use in patients with severe disease

Guidelines

22 May 2020

Remdesivir: publication in New England Journal of Medicine

Publication [17]

5 June 2020

Hydroxychloroquine: press release stating initial results from RECOVERY trial failed to demonstrate a benefit

Press release [47]

16 June 2020

Dexamethasone: press release stating preliminary results of recovery trial demonstrate benefit

Press release [48]

22 June 2020

Dexamethasone: RECOVERY preprint posted

Preprint [18]

25 June 2020

Dexamethasone: NIH treatment guidelines recommend use in severe disease

Guidelines

29 June 2020

Baricitinib: pilot study published in Clinical Infectious Diseases demonstrating possible benefit

Publication [31]

17 July 2020

Dexamethasone: Publication of RECOVERY Results in the New England Journal of Medicine

Publication [49]

29 July 2020

Tocilizumab: results of COVACTA released with no evidence of benefit

Press release [24]

27 August 2020

Tocilizumab: NIH treatment guidelines recommend against use

Guidelines

14 September 2020

Baricitinib: early results of trial released via press release demonstrating modest reduction in hospital length of stay

Press release [29]

8 October 2020

Hydroxychloroquine: results of RECOVERY trial published demonstrating no benefit

Publication [50]

15 October 2020

Remdesivir: results of WHO study released demonstrating no benefit

Preprint [51]

21 October 2020

Tocilizumab: results of clinical trial published demonstrating no benefit

Publication [23, 52]

19 November 2020

Baricitinib: FDA EUA

EUA [53]

11 December 2020

Baricitinib: ACCT-2 study results published in New England Journal of Medicine

Publication [28]

14 December 2020

Baricitinib: NIH treatment guidelines recommends limited use in limited populations

Guidelines

7 January 2021

Tocilizumab: REMAP-CAP trial preprint demonstrating a benefit in combination with dexamethasone

Preprint [26]

11 February 2021

Tocilizumab: RECOVERY preprint posted demonstrating a benefit in combination with dexamethasone

Preprint [27]

5 March 2021

Tocilizumab: NIH treatment guidelines recommend for use in ICU patients

Guidelines

3 May 2021

Baricitinib: COV-BARRIER preprint posted demonstrating a benefit in combination with dexamethasone

Preprint [30]

27 May 2021

Baricitinib: NIH treatment guidelines recommend use for patients with severe disease in combination with dexamethasone

Guidelines

23 May 2022

Baricitinib: publication in Lancet Respiratory Medicine demonstrating a benefit of baricitinib over dexamethasone

Publication [32]