In Conclusion, Nicotine which is an alkaloid organic compound, is the main component of tobacco that maintains the smoking habit and can lead to addiction and hazardous diseases. It has low boiling point; therefore, it is burned easily when smoking cigarette. In addition, Nicotine has many benefits; it acts as stimulant and can help in treatment of many diseases, whereas it also causes harmful diseases, such as Lung Cancer, Alzheimer, Schizophrenia and Parkinson, if nicotine is taken in large doses. Nicotine addiction occurs if taken in tobacco products when it becomes difficult to stop the substance even though it is harmful. Moreover, it changes the biochemical makeup of the brain, as it produces altering effects in the brain, and these
