TALLAHASSEE, Fla. — A California psychiatrist who has advised Gov. Ron DeSantis on the coronavirus pandemic recently promoted a drug for COVID-19 patients that federal disease experts have strongly warned against after a spike in calls to poison control centers. The surge of interest in the parasite drug, ivermectin, prompted the Centers for Disease Control and Prevention on Thursday to issue a national alert advising against its use to treat coronavirus. The maker of the drug, Merck, has also said there is “no scientific basis” to claim that ivermectin is effective against COVID-19. Dr. Mark ...