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Memory-like effects in brain reward pathway could contribute to drug addiction. The effects of nicotine upon brain regions involved in addiction mirror those of cocaine, according to new neuroscience research. A single 15-minute exposure to nicotine caused a long-term increase in the excitability of neurons involved in reward, according to a study published in The Journal of Neuroscience.
Nicotine is highly addictive; in fact, it is as addictive as heroin and cocaine. Nicotine reaches the brain within 8 seconds of inhalation. Its effects on the body include increased heart rate and blood pressure, increased alertness, and reduced appetite. Although nicotine is an addictive substance, it is actually the tobacco in nicotine products that can cause deadly cancers.