Drug abuse was studied among 2,170 students from various institutions of Lahore: 860 from Medical Colleges, 600 from Law Colleges and 710 from Punjab University. There was a high prevalence of the use of tranquilizers than that of hypnotic. The percentage of abusers in the Medical Colleges (17.3%) is greater than in Law College (8.10%) or University (9.1%). The source of knowledge about the drugs among the abusers mainly through their friends and medical prescriptions. The students of the Medical College had more friends using mood modifying drugs (52.3%) as compared to 14.8% in Law Colleges and 32.2% among University Students.