Background: Hepatic injury can occur with the use of nimesulide, a non steroidal anti-inflammatory drug. This study was done to evaluate the hepatic and renal functions in patients with rheumatological complaints receiving nimesulide for 2 weeks.Methods: Fifty patients with rheumatological complaints treated at orthopaedic outpatient clinic of a tertiary care centre with nimesulide 100mg twice daily were enrolled in this study. The sociodemographic details, details of comorbidities, history of use of alcohol or tobacco, indication for treatment with nimesulide etc. were recorded in a predesigned proforma. All patients were followed up for two weeks and reviewed at the end of each week for any gastrointestinal adverse effects, changes in blood routine, liver function tests and renal function tests. Data collected was entered in Microsoft Excel 2010, analysed and results were expressed as mean and standard deviation.Results: Out of the fifty patients analysed, mean age was 39 years. 66 % were males. Among liver function tests, only serum albumin and serum aspartate aminotransferase (SGPT) were altered after treatment with nimesulide. Blood urea nitrogen, serum creatinine and blood routine remained normal. No gastrointestinal adverse effects were noted.Conclusions: Nimesulide produced changes in serum albumin and SGPT levels without prominent gastrointestinal or renal adverse effects.