There are two main categories of quit-smoking products: medications (they don’t have nicotine and can be bought by prescription) and nicotine replacement products (include an inhaler, spray, lozenges, gums and patches).
All the mentioned products reduce nicotine cravings and withdrawal signs. So it’s more likely that you will refuse from smoking. Electronic cigarettes is an alternative way to give up smoking. However this product is not FDA-approved. E-cigarettes are not as safe as nicotine-replacement products. And they don’t help people to stop this habit.