>>15090705 lb

>>15090681 lb

Without the "hydroxy," chloroquine has more serious side effects. China only listed the more toxic version.

"BACKGROUND

Chloroquine (CQ) was first used as prophylaxis and treatment for malaria. Hydroxychloroquine (HCQ) is a more soluble and less toxic metabolite of chloroquine, which causes less side effects and is, therefore, safer (1-3)."

https://www.cebm.net/covid-19/chloroquine-and-hydroxychloroquine-current-evidence-for-their-effectiveness-in-treating-covid-19/