Gefitinib blocks the function of epidermal growth factor receptor which is a key factor in stimulating liver cancer growth. In mice, gefitinib has been shown to reduce the size of liver cancer. It also had anti tumor activity in patients with various cancers including HCC. Gefitinib can relieve disease-related symptoms in these patients. Overall, gefitinib is a very well tolerated treatment and is suitable for long-term use.