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Comparison of postoperative diastolic blood pressure between two groups. Statistically significant change (P<0.05) in DBP was found (Student's unpaired t test) among the groups of patients. In TDB group -DBP was satisfactorily in normal range but lower than that of placebo group. DBP – Diastolic blood pressure, TDB – Transdermal buprenorphine; TDP – Transdermal placebo
