Introduction: Globally, India stands second to China in the total number of smokers. Recent findings showed huge growth in adult male smokers in the country. One out of five adults i.e 20% adults smoke all over the world, With over the 20th century it killed around 100 million people. Objective and Methodology: The purpose of this study is to analyse the effects of cigarette smoking and nicotine dependency on lung function of healthy smokers using Fagerstrom__ampersandsignrsquo;s questionnaire and spirometry. Where along with the history, spirometry and Fagerstrom__ampersandsignrsquo;s questionnaire is asked. The test is performed on 76 patients who are divided into four categories based on Fagerstrom__ampersandsignrsquo;s questionnaire namely low nicotine dependence, low __ampersandsignndash; moderate nicotine dependence, moderate nicotine dependence, and high dependence. The differences in the mean value of each parameter between the four categories of smokers based on the duration of smoking and also on the number of cigarettes smoked per day were analyzed and discussed. Result: The mean FVC of the patients with high dependence (54.12__ampersandsignplusmn; 18.893) is lesser and the mean FVC of the patients with low dependence (72.85__ampersandsignplusmn;14.072) is greater. This concludes higher nicotine dependence has reduced FVC and there is near significance between each category and the mean FEV1 of the patients with high dependence (42.12__ampersandsignplusmn; 21.437) is lesser and the mean FEV1 of the patients with low dependence (67.58__ampersandsignplusmn;18.322) is greater. Conclusion: This concludes the high dependence on nicotine has reduced FEV1 and there is near significance between each category. An increase in Nicotine dependence level decreases the BMI moderately.