I had smoked for 40 years and up to 2.5 packs per day.Doctor said I would not live to 65 years old if I didn't quit. (I'm 57 now)I had tried the patch before and had no luck.I had also tried Chantix with no luck.I recently tried again on the 1st day of this month.It did not stop my cravings. I continued to smoke with the patch for 3 days.Being desperate, I tried a patch and a half (I cut a patch in half). To my surprise, the next morning when I woke up, I had no cravings. I continued this for 4 days. I then went back to a single patch....I'm starting on day 12!!!!........I feel great!!!!!