HCQ weight-based dosing: out HCQ whole blood monitoring: in Whole blood levels more precisely balance risks of SLE flare (under-dosing) vs. toxicitiy (over-dosing) Many pt on <5 mg/kg had supra-therapeutic blood levels with risk for toxicity @RheumNow #ACR25 #ACRBest Abst 1722 https://t.co/qIbACxAW39