What is hydroxychloroquine (Plaquenil), and what is it used for?
Hydroxychloroquine (Plaquenil) and its sister drug chloroquine (Aralen) are under investigation for treatment of the COVID-19 coronavirus disease.
Korean doctors used these anti-malaria drugs to treat COVID-19 with some success, according to a paper filed with Elsevier in March 2020, but effectiveness is unproven.
Hydroxychloroquine is classified as an anti-malarial drug. It is similar to chloroquine (Aralen) and is useful in treating several forms of malaria as well as lupus erythematosus and rheumatoid arthritis. Its mechanism of action is unknown.