Nicotine replacement therapy replaces temporarily the nicotine from cigarettes which reduces motivation to smoke and nicotine withdrawal symptoms, thus easing the transition from cigarette smoking to complete abstinence. Nicotine replacement therapy replaces nicotine in blood, thus reduces urge to smoke. NRT is available as chewing gum, patches for the skin, nose spray, inhalers, and tablets. It is better to wait until the smokers feel ready to stop, and then make a quit attempt. All of the commercially available forms of NRT can help people who make a quit attempt to increase their chances of successfully stopping smoking. It is a cost effective way of reducing ill health and prolonging life.