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Vasoconstrictor drugs may improve renal function in hepatorenal syndrome (HRS), but the effect on mortality has not been established. We therefore performed a systematic review of randomized trials on vasoconstrictor drugs for type 1 or type 2 HRS. Mortality was the primary outcome measure. Eligible trials were identified through electronic and manual searches. Intention‐to‐treat random effects meta‐analyses were performed. Ten randomized trials on terlipressin alone or with albumin, octreotide plus albumin, and noradrenalin plus albumin were included. The total number of patients was 376. Overall, vasoconstrictor drugs used alone or with albumin reduced mortality compared with no intervention or albumin (relative risk [RR], 0.82; 95% confidence interval [CI], 0.70–0.96). In subgroup analyses, the effect on mortality was seen at 15 days (RR, 0.60; 95% CI, 0.37–0.97) but not at 30 days (RR, 0.74; 95% CI, 0 …