NSAID cause the elevation of vascular resistance and then the blood pressure via blocking the synthesis of prostaglandins. Besides, the effect of NSAID on the kidney will cause the elevation of blood pressure, too. Many studies had demostrated the NSAID will cause the elevation of blood pressure, and according to the meta-analysis of these data, the rise of mean arterial pressure is about 5 mmHg. The risk of cardiovascular and cerebrovascular complication seemed to be higher on the old-age and the p't with hypertension. Not all NSAIDs are equal as far as their effect on blood pressure is concerned. The interference seemed to be larger with indomethacin and neproxen.