i am 57 and has stage 4 lung cancer. i was diagnosed in jan this year. i recently had 18 rounds of radiation which shrunk my tumor but since then there is a spot on my spine and inmy lymph i have recently started taking tarceva and have the rash. i haven't had any diarreah and hope i dont. i go back to my oncologist on the 23rd of nov. i guess we will have test set up to see if tarceva is doing me any good.