https://www.selleckchem.com/products/ly333531.html In laparoscopic cholecystectomy, pneumoperitoneum results in tachycardia, hypertension, and increased myocardial oxygen demand. These changes are more pronounced in hypertensive patients. The intravenous administration of dexmedetomidine attenuates sympathoadrenal response and provides better hemodynamic stability intraoperatively. To evaluate the hemodynamic stabilizing and sedation properties of two different doses of dexmedetomidine including 0.7 μg.kg .h and 0.5 μg.kg .h in hypertensive patients undergoing laparoscopic cholecystectomy. This was a randomized, prospective, double-blind controlled trial. A total of 60 controlled hypertensive patients of either sex, aged 30-60 years, and ASA class 2 without any other serious comorbid conditions who were undergoing laparoscopic cholecystectomy under general anesthesia were randomly assigned into three groups of 20 each. Group A and B received loading dose of dexmedetomidine 1 μg.kg over 10 min and maintenance dose at 0.7 and 0.5 μg.kg .h , respectively. Group C received normal saline infusion only. Hemodynamic parameters (heart rate and systolic, diastolic, and mean arterial pressure) and sedation score were compared at different time intervals among groups. The Chi-square test, ANOVA, and Tukey Test. Fluctuations in the hemodynamics of hypertensive patients are effectively attenuated by dexmedetomidine and there is no difference in the attenuation of these hemodynamic changes by maintenance dose of 0.5 or 0.7 μg.kg .h . However, maintenance dose of 0.5 μg.kg .h causes lesser sedation. Dexmedetomidine administered as infusion in a maintenance dose of 0.5 μg.kg .h serves as an ideal anesthetic adjuvant in hypertensive patients undergoing laparoscopic cholecystectomy. Dexmedetomidine administered as infusion in a maintenance dose of 0.5 μg.kg-1.h-1 serves as an ideal anesthetic adjuvant in hypertensive patients undergoing laparoscopic cholecystectomy. Although the conv