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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.
How tobacco affects your body. Brain. Nicotine, the drug that makes tobacco addictive, goes to your brain very quickly. Nicotine makes you feel good when you are smoking, but it can make you anxious, nervous, moody, and depressed after you smoke. Using tobacco can cause headaches and dizziness. Mouth. Tobacco stains your teeth and gives you bad breath. Tobacco ruins some of your taste buds, so you won't be able to taste your favorite foods as well.