People are taking dangerous doses of an anti-parasitic drug as a COVID-19 treatment, even though there is no solid evidence that it has any benefit for the disease.

The drug, called ivermectin, is often used to treat or prevent parasitic diseases in animals, such as heartworm, according to the Food and Drug Administration. In humans, some forms of the drug are used to treat parasitic worms, and a topical version of it is sometimes used to treat head lice.