BTK inhibitor
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.Lilly’s Jaypirca (pirtobrutinib) Achieves Primary Endpoint in Landmark Head‑to‑Head Phase 3 Trial Against Imbruvica (ibrutinib)
words.Eli Lilly’s Phase 3 BRUIN CLL‑314 trial showed pirtobrutinib, a reversible BTK inhibitor, achieved a non‑inferior ORR of 87 % versus 78.5 % for ibrutinib in CLL/SLL patients, meeting its primary endpoint. Early PFS trends favored pirtobrutinib, with a 43 % reduction in progression/death risk overall and 76 % in treatment‑naïve patients. The drug demonstrated a safer profile—lower atrial fibrillation (2.4 % vs. 13.5 %) and hypertension (10.6 % vs. 15.1 %). FDA‑approved after covalent BTK failure, it now seeks frontline indication, potentially reshaping the BTK inhibitor market.
