A nicotine patch is a transdermal patch that releases nicotine into the body through the skin. It is used in nicotine replacement therapy (NRT), a process for smoking cessation. Released nicotine adheres to nicotine receptors in the body, decreasing nicotine craving and withdrawal symptoms linked with smoking cessation. In general, nicotine replacement therapy (NRT) is a range of healthcare products that release low and controlled amounts of nicotine, without the other harmful substances found in tobacco such as tar and carbon monoxide. These toxic substances can increase the possibility of conditions such as cancer and heart disease (heart attacks, high blood pressure, and irregular heartbeats). Thus, the need for nicotine therapy for smoke quitters is driving the global nicotine patch market.