“…Various drugs implicated in the causation of HFS are infusional 5-flurouracil, capecitabine,[4] vinorelbine, liposomal doxorubicin, hydroxyurea, mercaptopurine, intravenous cyclosporine, methotrexate, cyclophosphamide, cytosine arabinoside, sunitinib, and sorefenib. The mechanism of HFS is still obscure.…”