Healthcare WHO pauses hydroxychloroquine trials citing safety concerns Updated : May 26, 2020 04:51 PM IST The trial halted as new Lancet study showed no benefit, higher risk of death and cardiac complications. There are reportedly over 150 studies currently ongoing across the world on hydroxychloroquine and its use in COVID-19 treatment. India recently expanded use of hydroxychloroquine as a preventive therapy for COVID-19. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.