My husband tried and tried to quit. Tried classes, the patch etc. and went back to smoking. What finally worked for him was Zyban. It was a miracle he had no cravings, nothing. Made him feel great, he said, so great that after adopting 2 children years ago I got pregnant while he was on it! Anyway, that's what did it for him You take the Zyban while smoking and then pick a stop date once it's in your system.