<unk> , sold under the brand name Iressa, is a medication used for certain breast, lung and other cancers.<unk>  is an EGFR inhibitor, like erlotinib, which interrupts signaling through the epidermal growth factor receptor (EGFR) in target cells. Therefore, it is only effective in cancers with mutated and overactive EGFR, but resistances to<unk>  can arise through other mutations. It is marketed by AstraZeneca and Teva. It is on the World Health Organization's List of Essential Medicines.
Gefitinib
Nilotinib
Erlotinib
Lestaurtinib
Icotinib
Axitinib
Crizotinib
Tepotinib