evidence: Trump then falsely claimed that evidence suggests hydroxychloroquine does not have negative side effects. "What has been determined is it doesn’t harm you." In reality, the FDA has said hydroxychloroquine should only be used as a coronavirus treatment in hopsital settings, due to "reports of serious heart rhythm problems" in virus patients who had received the drug. [...] After Trump hyped the drug in March, an Arizona man died from ingesting a form of chloroquine used to clean fish tanks.