The nicotine patch is a transepidermal patch designed to deliver nicotine, the addictive substance in cigarettes, directly through the skin into the bloodstream. The patch contains a drug reservoir sandwiched between a nonpermeable back layer and a permeable adhesive layer that attaches to the skin. The drug leaches slowly out of the reservoir, releasing small amounts of the drug at a constant rate for up to 24 hours. (Illustration by Electronic Illustrators Group.) Image on Healthline

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The nicotine patch is a transepidermal patc...

The nicotine patch is a transepidermal patch designed to deliver nicotine, the addictive substance in cigarettes, directly through the skin into the bloodstream. The patch contains a drug reservoir sandwiched between a nonpermeable back layer and ...

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