Japan Just Approved Drug That Kills Flu in 24 Hours The drug maker Shionogi has manufactured the pill Xofluza, which is supposed to cure the flu within a day. According to the Wall Street Journal, the pill doesn't have a price yet and it may not be available in Japan until May this year. The report also said it wouldn't hit the United States until some time in 2019. In the U.S., there have been 84 pediatric deaths, reports say, in one of the worst flu seasons in years.