A nicotine patch is a small adhesive patch that delivers a controlled amount of nicotine through the skin into the bloodstream. It is commonly used as a part of smoking cessation programs to help individuals quit smoking by reducing withdrawal symptoms and cravings associated with quitting. The patch is available in various strengths, allowing users to gradually decrease their nicotine intake over time. It is typically worn on the skin for 16 to 24 hours, depending on the specific product. Users should follow the instructions provided to ensure effective use and minimize potential side effects.