Leslie: my copay was 30% for blue cross blue/shield federal employees basic plan. I had a secondary plan which absorbed much of the 30% copay. I never used tarceva.
I had heard that it can be much cheaper if you order your chemo drugs by the mail. I have not looked into this, but a person with blue cross/blue shield federal employees standard plan said she had a copay of 20 bucks for all her chemo drugs by doing the mail order thing. If I ever have to do chemo again, I will look into it. If your plan consents to the tarceva, maybe you should see if you can get it cheaper by doing the mail order thing.
Don M