#ACR23 Abstr#0785 So many debates re: HCQ dose 5mg/kg/d vs 6.5mg/kg/d - could blood monitoring help? A cohort study showed HCQ levels 750-1100 ng/mL was associated with reduced risk of #lupus activity by 76-90%. Need validation & assoc with retinal toxicity risk @RheumNowNews https://t.co/oRCHUG2dVA