EGFR inhibitors are used to treat certain types of non-small cell lung cancer and head and neck cancer. They also have other uses, such as treating pancreatic cancer. EGFR inhibitors work by blocking epidermal growth factor receptors (EGFR) on cancer cells, which helps to slow down or stop their growth. These medications come in different forms, including oral pills and injections. Examples include Tarceva (erlotinib), Tagrisso (osimertinib), and Erbitux (cetuximab), among others.