In small doses, like those contained in the gum, nicotine is generally considered safe. But it does have stimulant properties that can raise blood pressure, increase heart rate and constrict blood vessels. One large report from 2010 found that compared to people given a placebo, those who used nicotine replacement therapies had a higher risk of heart palpitations and chest pains.
That’s one reason that nicotine gum should, ideally, be used for no more than four to six months, said Lauren Indorf, a nurse practitioner with the Cleveland Clinic’s Tobacco Treatment Center. Yet up to 10 percent of people use it for longer periods, in some cases for a decade or more she said.
Some research has raised speculation that long-term use of nicotine might also raise the risk of cancer, though it has mostly involved laboratory and animal research, and there have not been any long-term randomized studies specifically addressing this question in people. One recent report that reviewed the evidence on nicotine replacement therapy and cancer concluded that, “the risk, if any, seems small compared with continued smoking.â€
Ultimately, the biggest problem with using nicotine gum for long periods is that the longer you stay on it, the longer you remain dependent on nicotine, and thus the greater your odds of a smoking relapse, said Ms. Indorf. “What if the gum is not available one day?†she said. “Your body is still relying on nicotine.â€
If you find yourself using it for longer than six months, it may be time to consider switching to sugar-free gum or even another replacement therapy, like the patch or nasal spray.
“Getting peo ple on a different regimen helps them break the gum habit and can help taper them off nicotine,†Ms. Indorf said.
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