About

A stroke happens when blood flow to part of the brain is cut off, causing brain cells to die; most strokes are ischemic, meaning a clot blocks an artery in the brain, and a transient ischemic attack (TIA) is a brief, clot-related warning episode that often signals a full stroke is coming. Asundexian is an oral drug that blocks Factor XIa, a clotting protein involved in forming the clots that cause these blockages. Because it targets that clotting step, asundexian may help prevent a second stroke or TIA in people who have already had one.