My Wife is on tarceva now and was on Iressa. Iressa was not as harsh but studies showed that it did not work as well as tarceva and we stopped taking it. Deb takes 150MG a day, has rash but very little nausea, (Immodum AD and Promethazine for that) We will go for a Cat scan next monday to see how the tarceva is working. Good luck in getting things resolved. I Do not know if this info helps but hope so.
Always praying RSW1124