In prelim analysis of this controlled clinical trial, SLE pts w/ active dse who weres given addtl NAC for 3 mos had significantly reduced dse activity. Mechanism? NAC reduces rapamycin (mTOR) activation. Common AEs: nausea, vomiting @RheumNow #ACR24 abs2677 https://t.co/E4w2Qd7RwP