In the same way, Sunitinib, Nocodazole, Topotecan, Cyclosporine, Dasatinib, Etoposide, Fluorouracil, Irinotecan, Methotrexate, and Azathioprine might be viewed as targeted drugs for the treatment of SCLC patients with high expression of BUB1. Here, BUB1 is linked to small cell lung carcinoma.