Hydroxychloroquine (HCQ) is a synthetic oral antimalarial drug that can be used in the study of malaria and autoimmune diseases such as systemic lupus erythematosus and rheumatoid arthritis. Hydroxychloroquine is a potent autophagic flux inhibitor with antiviral activity (such as SARS-CoV-2 virus) that inhibits Toll-like receptor 7/9 (TLR7/9) signaling[1][2][3][4][5][6][7][8].