LEA PATERSON / SCIENCE PHOTO LIBRARY LEA PATERSON / SCIENCE PHOTO LIBRARY
Nicotine patch. Woman applying a nicotine patch to her shoulder. This is a type of nicotine replacement therapy (NRT). Nicotine is an addictive drug found in cigarettes. The patch is applied to the surface of the skin and the nicotine in the patch is released in small measured doses into the bloodstream. A course of patches slowly decreases the amount of nicotine delivered, easing the withdrawal symptoms felt by smokers who are trying to quit.
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