Introduction: Steven-Johnson syndrome and Toxic Epidermal Necrolysis are rare but life threatening severe cutaneous adverse reactions to drugs. To determine the epidemiology of SJS, TEN and SJS/TEN overlap in University Malaya Medical Centre (UMMC). Methods: All patients admitted to UMMC from year 2013-2015 for SJS, SJS/TEN, TEN were recruited. The classification of SJS, SJS/TEN overlap and TEN was made based on the criteria laid down by Bastuji et al.2 Results: A total of 32 patients were recorded to have SJS, SJS/TEN overlap and TEN from 2013 to 2015. Drugs (n=32, 86.49%) remained the most common aetiology of SJS and TEN. The top three commonest drugs are allopurinol (n=6), followed by carbamazepine (n=5) and bactrim (n=3). Conclusion: This study demonstrates that drugs were the most common cause of SJS/TEN. Antibiotics were the most common drug group that caused SJS/TEN. Awareness of the common etiology such as drug is important and high index of suspicion of SJS and TEN is needed if patients were on the above medications.