Hello Shannon!
Maybe your Dad could try gradually quitting so he wouldn't have such bad withdrawl symptoms. I read about a four step program, where you cut your cigarette consumption in half, then after two or three days in half again and so on till you are down to no cigarettes. Or he could try one cigarette every half hour at first, for a few days, then 45 minutes and make the intervals between cigarettes longer and longer till he is free. My sister said she quit smoking so gradually that she didn't have any symptoms of withdrawl. She smoked about two packs a day. Some doctors will have him take Welbuterin for two weeks and then quit. He probably couldn't take the patch because if you decide to smoke you have to take it off and wait six hours or you could have a stroke. Believe me, I empathize with him and have fallen off the wagon. I am trying the gradual approach myself and hope I can be successful. Praying for both of you!
Sharon