It means take one tablet by mouth twice a day. Since a day is 24  hours, dividing that by two means one tablet every 12 hours.
The nicotine patch is an over-the-counter medicine that can help people stop smoking. The nicotine patch (NicodermÂ® CQÂ®) is a nonprescription medication used for nicotine replacement therapy. It helps people stop smoking by reducing nicotine withdrawal symptoms, including nicotine craving. Nicotine is a highly addictive drug. Each time you inhale from a cigarette, nicotine rapidly enters the brain, reaching peak levels within 10 seconds. In the brain, it activates brain reward centers, leading to feelings of pleasure. The effects of nicotine disappear quickly, however.
People who use the nicotine patch are nearly twice as likely to quit and stay stopped. When using the patch you absorb less nicotine at a much slower rate than when smoking. This makes it less addictive and easier to stop using than cigarettes.After putting on the patch, the level of nicotine in your blood slowly rises over a few hours. If you take off a patch and immediately put on a new patch, your nicotine level will remain raised.Over a day, patch users typically absorb up to two-thirds the dose of nicotine that they would get from smoking a pack of cigarettes a day.his makes it less addictive and easier to stop using than cigarettes. After putting on the patch, the level of nicotine in your blood slowly rises over a few hours. If you take off a patch and immediately put on a new patch, your nicotine level will remain raised.