The federal government is stuck with 63 million doses of hydroxychloroquine now that the US Food and Drug Administration has revoked permission for the drug to be distributed to treat coronavirus patients.

The government started stockpiling donated hydroxychloroquine in late March, after President Trump touted it as “very encouraging” and “very powerful” and a “game-changer.”

But Monday, the FDA revoked its emergency use authorization to use the drug to treat Covid-19, saying there was “no reason to believe” the drug was effective against the virus, and that it increased the risk of side effects, including heart problems.