In cooperation with the Amal Centre for Mental Health and Addiction Treatment in Kharj, the Student Activity Unit at the Community College of Kharj held an awareness lecture for the students of the College entitled "Prevention of Psychiatric Diseases and Addictions" on Wednesday, 9/2/1440 AH. The lecture shed light on the definition of mental disease as a defective performance in the human personality due to deviation from normal behaviour. The disease is manifested in the form of mood disorders, convulsive disorders, convulsions, and personality disorders. The disease is also due to several causes including physiological genetic causes, environmental causes, and emotional trauma that may afflict a person. In addition, the lecture shed light on various remedial measures, most important of which are: medicinal, behavioural and social treatment. Last but not least, the lecture pointed out that addiction may be due to the ignorance of the danger of drug use, the weakness of religion, family disintegration, poverty, unemployment and Weak family control.