⬆HCQ blood levels significantly associated w/ ⬇ in mean SLEDAI, UPCR, SBP & platelet cts 🔷Assoc'n strongest in HCQ conc'n in range 0-1000ng/mL A possible HCQ blood level target to ⬇ 👁toxicity?🤔 @RheumNow #ACR21 abs1753 https://t.co/3jkDDakIcb