The nicotine replacement therapy works best when supplemented by smoking cessation instruction. In addition to controlling the physical desire to light up a cigarette, the emotional desire must be conquered, as well. It is possible to get an overdose of nicotine, so obviously, a person should not smoke while wearing the patch or chewing the gum. Symptoms of an overdose might include dizziness, upset stomach, diarrhea, blurred vision and lightheadedness. After the first patch is applied, some people notice a mild itching which usually goes away within an hour.
Some people do develop a skin rash or inflammation of the skin under the patch.
Patch wearers are advised to take it off if any unusual symptoms appear, and to contact their physician. As you progress through the nicotine therapy, keep focused on all the reasons you decided to quit. This will help strengthen your resolve if you have nagging thoughts about cigarettes. Remember, you don't have to act on those thoughts. One slip doesn't mean you have failed, but it does signal that immediate steps are necessary to avoid slipping in the future.