A Powerful Addiction The power of nicotine on the brain is largely untold. Like the harder drugs, repeated nicotine use does cause a physiological reaction in the brain. According to Dr. Sharon Hall, a psychology professor at the University of California’s San Francisco medical school, “Heroin addicts say it is easier to give up dope than it is to give up smoking.” Not only is this a truly frightening thought, but it speaks volumes to how addictive nicotine really is. Nicotine, like heroin, comes from an alkaloid found in plants. This alkaloid protects the plant by disrupting the neurotransmitters in insects looking for a good meal. Unfortunately, humans have the same neurotransmitters. Where heroin attaches to your brain’s natural painkilling receptors , nicotine affects different neurotransmitters that involve nerve signals, memory, and various other critical functions. Nicotine also binds to your white blood cells and is carried to most tissues throughout the body. According to studies, when given intravenously in gradually larger doses, nicotine rates as “highly euphoric,” with dose-response curves similar to those of cocaine, amphetamines, and morphine. “Nicotine was between 5 and 10 times more potent in producing a euphoric effect than cocaine.” The reason smokers need to smoke all day long, however, is that the euphoric effect is brief as they only inhale tiny amounts of nicotine. Like heroin and other hard-core drugs, the withdrawal effects from nicotine are harsh so people continue to smoke despite the well-documented and deadly repercussions.

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