Plenary 3, HCQ blood levels in SLE HCQ level > 1150: 1.9x risk of HCQ toxicity HCQ level < 750: 1.4x risk of active SLE HCQ dose < 5mg/kg: 1.9x risk active SLE My take home? Blindly reducing dose to <5mg/kg is BAD; use levels instead! @RheumNow #ACRBest #ACR25 Abstr1722 https://t.co/UCBPAKAyon