Beeline Medicines presented detailed Phase 2 results for afimetoran, an oral lupus drug originally developed by Bristol Myers Squibb, at the American College of Rheumatology’s 2026 meeting. In a 248-person trial of systemic lupus erythematosus (SLE), all three daily doses met the primary endpoint at Week 48. SRI-4 response rates were 67.8%, 64.1% and 66.1%, versus 34.4% with placebo—an adjusted placebo difference of about 30–32 percentage points. Secondary measures generally favored afimetoran, including lupus disease activity, skin and joint symptoms, and corticosteroid reduction. For example, 71.9%–75% of participants on afimetoran reached or maintained a daily steroid dose of 7.5 mg or less, versus 50% on placebo. The company reported serious adverse events in 5.9% of afimetoran-treated participants versus 12.9% on placebo; treatment discontinuations due to side effects were 3.2% versus 9.7%. These are trial findings, not proof of comparative safety in broader use. Afimetora...
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