Zanubrutinib Products | Cleanchem - Zanubrutinib is used to treat B-cell malignancies, including mantle cell lymphoma and chronic lymphocytic leukemia. It works by inhibiting Bruton's tyrosine kinase (BTK), a key enzyme in the B-cell receptor signaling pathway, which helps prevent the proliferation of cancerous B-cells. Zanubrutinib is often preferred due to its more favorable side effect profile compared to other BTK inhibitors. It is used in patients who have relapsed or refractory forms of these cancers.