I have a couple of questions. The first being that about 15 minutes after I take the Chantix (with a meal) I get so very sick, can I cut it down to half a pill twice a day and still be effective? The second how long does it take to work. I have been on it for 5 days, and not much has happened, I have cut back but sheer willpower. I still want a cigg. I have smoked a pack a day for about 33 years.