U.S. regulators on Monday revoked the emergency use of anti-malaria drug hydroxychloroquine, which President Donald Trump previously said he was taking based on the belief that it would protect him against the novel coronavirus.In late March, the U.S. Food and Drug Administration granted the emergency use of the drug to treat patients hospitalized with the coronavirus when clinical trials were not available. But in late April, it warned that the drug's side effects include "serious and potentially life-threatening heart rhythm problems."Hydroxychloroquine is a drug Trump has pitched as a po…READ FULL ARTICLE