'''Hydroxychloroqine''' (C<sub>18</sub>H<sub>26</sub>ClN<sub>3</sub>O), also known as '''hydroxychloroquine sulfate''' and '''HCQ''', is an inexpensive medication sold under the name '''Plaquenil'''.<ref>[https://www.drugs.com/plaquenil.html Plaquenil Uses, etc. - Drugs.com]</ref> Prior to [[COVID-19]] it was most commonly used to treat [[malaria]], and also currently to treat lupus. The package insert for Plaquenil describes its mostly minor potential side effects,<ref>https://www.accessdata.fda.gov/drugsatfda_docs/label/2017/009768s037s045s047lbl.pdf</ref> some of which occur at much higher doses than what is used to treat COVID-19. | '''Hydroxychloroqine''' (C<sub>18</sub>H<sub>26</sub>ClN<sub>3</sub>O), also known as '''hydroxychloroquine sulfate''' and '''HCQ''', is an inexpensive medication sold under the name '''Plaquenil'''.<ref>[https://www.drugs.com/plaquenil.html Plaquenil Uses, etc. - Drugs.com]</ref> Prior to [[COVID-19]] it was most commonly used to treat [[malaria]], and also currently to treat lupus. The package insert for Plaquenil describes its mostly minor potential side effects,<ref>https://www.accessdata.fda.gov/drugsatfda_docs/label/2017/009768s037s045s047lbl.pdf</ref> some of which occur at much higher doses than what is used to treat COVID-19. |