Common side effects of the gum include hiccups, sore mouth or jaw, headache, indigestion and nausea. Some of these symptoms may be relieved by chewing more slowly and resting the gum. Most users rate these reactions as mild. If side effects do not fade within a week or two, or they worry you, see your pharmacist or doctor.
Serious side effects are uncommon, and are described in the Consumer Medicine Information (pack insert) that comes with the gum. If you have these symptoms, follow the instructions in the leaflet and see a doctor as soon as possible. Do not smoke.
Safer than smoking
Using the nicotine gum is always safer than continuing to smoke. Tobacco smoke contains many cancer-causing substances, carbon monoxide and other dangerous chemicals, which the nicotine gum does not. Unlike smoking, nicotine is not a major cause of increased risk for cancer or heart disease. The gum does not increase the risk of heart attack in smokers who have stable heart disease. A small number of people may transfer their nicotine addiction from cigarettes to the gum. Though this is not ideal, it is safer than smoking.
It is important to store and dispose of the gum so that children and animals cannot get it, as it can be dangerous for them.