French doctors are no longer allowed to use hydroxychloroquine to treat COVID-19 cases, according to new government rules Wednesday, after two French advisory bodies said the drug could pose serious health risks. Use of the drug, normally a treatment for rheumatoid arthritis and lupus, has proven controversial after some prominent doctors and even US President Donald Trump began backing it during the coronavirus outbreak, despite a lack of sufficient trials on its effectiveness. juc/alu/cf/js/bp