The invention relates to a liquid nicotine mouth spray formulation for oral mucosal delivery and fast onset nicotine craving relief, the mouth spray formulation being designed to adhere to the oral mucosa, and the mouth spray formulation being designed to utilize free nicotine base as both a source of nicotine and a source of pH regulating agent, wherein the mouth spray formulation does not contain any further pH regulating agent other than said free nicotine base.