Nicotine patches are often used to help smokers quit. does giving medicine to fight depression also help? a randomized double-blind experiment assigned 244 smokers to receive nicotine patches and another 245 to receive botch a patch and the antidepressant drug "bupropion". Results: after a year, 40 subjects in the nicotine patch group had abstained from smoking, as 87 in the patch plus drug group. is this good evidence that adding bupropion increases the success rate?