A patented GSK‐3β inhibitor (GSK‐3βi), new benzothiazepinone compounds (BTZs), YC‐4‐3, can modulate the inflammatory status of macrophages in primary immune thrombocytopenia (ITP), and improve the thrombocytopenia in murine ITP models by directly interacting with endoplasmic reticulum (ER) stress response. This evidence concerns the gene GSK3B and autoimmune thrombocytopenic purpura.