Nicorette nasal spray is a nicotine replacement therapy or more commonly known as nrt it is used to relieve withdrawal symptoms and reduce the cravings for nicotine that you get when you are trying to quit smoking during the period when you are stopping smoking you will miss the nicotine and experience feelings and strong cravings for a cigarette when you spray nicorette nasal spray into your nose nicotine passes rapidly into your body through the lining of your nose the nicotine release