Background: Chewing tobacco is consuming smokeless tobacco products by chewing. Smoking is the act of inhaling and exhaling the fumes. Objectives: To assess the knowledge of 2nd year BSC (N) students regarding hazards of smoking and tobacco chewing and its prevention and hazards before administering the video assisted teaching program To assess the knowledge of 2nd year BSC (N) students regarding hazards of smoking and tobacco chewing and its prevention and hazards after administering the video assisted teaching programme. To evaluate the effectiveness of video assisted teaching programme to 2nd year BSC (N) students regarding hazards of smoking and tobacco chewing and its prevention and hazards. To find out association between the level of knowledge of students about hazards of smoking and tobacco chewing and its prevention and hazards with selected demographic variables.