How does nicotine replacement therapy reduce withdrawal symptoms?

• A. By delivering controlled nicotine doses to lessen cravings and withdrawal without smoking
• B. By increasing dopamine in the digestive tract
• C. By blocking nicotine receptors
• D. By eliminating nicotine from the body

Answer: (C)

Nicotine replacement therapy reduces withdrawal by providing a steady, controlled dose of nicotine that keeps brain nicotine levels from dropping between cigarettes. This steady exposure gently activates the brain’s nicotinic receptors, which eases cravings and withdrawal symptoms without the hazards of smoking. It’s not about blocking receptors—blocking nicotine’s effects is a different mechanism (seen with other drugs). It also doesn’t work by increasing dopamine in the digestive tract; the dopaminergic effect that helps with withdrawal mainly occurs in brain reward pathways. And it doesn’t eliminate nicotine from the body—the withdrawal relief comes from maintaining a low, steady nicotine level.