A large clinical trial from June 2020 has shown no clinical benefit to hydroxychloroquine in hospitalised patients with COVID-19
No clinical benefit from use of hydroxychloroquine in hospitalised patients with COVID-19: https://www.recoverytrial.net/news/statement-from-the-chief-...
From the above:
> A total of 1542 patients were randomised to hydroxychloroquine and compared with 3132 patients randomised to usual care alone. There was no significant difference in the primary endpoint of 28-day mortality (25.7% hydroxychloroquine vs. 23.5% usual care; hazard ratio 1.11 [95% confidence interval 0.98-1.26]; p=0.10). There was also no evidence of beneficial effects on hospital stay duration or other outcomes.
> These data convincingly rule out any meaningful mortality benefit of hydroxychloroquine in patients hospitalised with COVID-19.