It is a good idea to take Tarceva at night. Remember it has to be\
2 hours after you have eaten anything. I found that when I took Tarceva during the day, it made me sleepy. Taking it at night is the best thing. It is a great drug, Good luck It does have a lot of side effects, dry skin, dry mouth, and diarrhea.. Use a mouth wash with no alcohol, Biotene for example. Keep positive Enjoy each day, Vette