BACKGROUNDCigarette smoking is a preventable cause of peri-operative respiratory complications, wound infection, myocardial infarction, stroke, and mortality. Smoking is associated with increased peri-operative complications. The primary objective of the study is to compare the nature, incidence of intra-operative & post-operative complication in asymptomatic smokers subjected to day care surgery under general anaesthesia to that of non-smokers in our hospital.