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.
1 Peel off the backing from the nicotine patch and place the patch on your skin. 2  Hold the patch for 10 seconds to make sure it sticks. 3  Change the patch at the same time every day. 4  Change where you place the patch to lower the risk of skin irritation. Change the patch at the same time every day. 2  Change where you place the patch to lower the risk of skin irritation. 3  Throw out the used patch by folding the sticky side together and placing it in its original wrapper. 4  Wash your hands after putting on or taking off the patch.