NiQuitin Clear 21mg patches help you quit smoking by replacing some of the nicotine you get from cigarettes. When you put one on, it slowly releases nicotine into the body, relieving some of the unpleasant symptoms that smokers may have when they try to give up, such as feeling ill or irritable. The patches can also help reduce cravings for a cigarette and make it easier to resist the urge to smoke. NiQuitin Clear patches may be used alone or in combination with other NiQuitin products, such as lozenges or gum. They do not contain the health dangers of tobacco, as they do not have tar, carbon monoxide, or other toxins found in cigarette smoke. Some people worry that they may become dependent on the patches after stopping smoking, but this is very rare and less harmful than continuing to smoke.