The U.S. Food and Drug Administration is revoking its emergency authorization for malaria drugs for treating COVID-19 despite President Donald Trump promoting it.

The FDA says new evidence shows that malaria drugs don’t work and could have deadly side effects.

The agency said Monday that the drugs hydroxychloroquine and chloroquine are unlikely to be effective in treating the coronavirus. Citing reports of heart complications, the FDA said the drugs pose a greater risk to patients than any potential benefits.

The drugs mainly prescribed for lupus and rheumatoid arthritis, can cause heart rhythm problems, severely low blood pressure and muscle or nerve damage.

Doctors will still be able to prescribe these drugs but not for treating COVID-19.