What to do if I heard tarceva (erlotinib) is a medicine that has a positive effect on cancer patients. Is that true?

Erlotinib is its . Generic name. It is a tyrosine kinase inhibitor. It works on tumors that have a driving force caused by epidermal growth factor receptor. If the tumor has specific mutations, it is likely to work; if not. Likely it will not work by any mechanism that we understand...Long shot.