Just quit buying them, and then STOP! Don't let it hook you any worse, get off the crap now, before you end up like the rest of us here, who didn't quit until 20, 30, 40 years later! Then it's REALLY hard. If you quit cold turkey, then it should be out of your system in 72 hours, or so. Keep busy, and don't go back. YOU CAN DO IT!!!

If you have to, go buys some patches. Just get off the smokes soon. (How many have you been smoking a day?)
GOOD LUCK!!!!
Deda