Objective: To assess the prevalence of internet addiction and its relationship with the personality traits in undergraduate medical students. Materials and Methods: The present study employed a descriptive, correlative method and the sample comprised 300 undergraduate medical students of Mamata Medical College, Khammam. The tools used are Internet Addiction test (IAT) designed and developed by Young and NEO­Five Factor Inventory (NEO­FFI) questionnaires. Results: Results indicated that 71.6% of medical students are addicted to internet, internet addiction is high in final year medical students and internet addiction is significantly correlated with conscientiousness. Conclusion: The study demonstrated that there is high prevalence of internet addiction in medical students, so to prevent internet addiction in adolescents we should take measures like teaching and counseling them regarding the pathological effects of internet addiction and also personality screening to be done during the start of under graduation to identify the risk personalities and to counsel them from being addicted.

Keywords: Personality Traits; Internet Addiction; Medical Students.