A client with portal hypertension develops bleeding esophageal varices. Which intervention should the nurse prioritize to prevent further complications?

In a client with portal hypertension and bleeding esophageal varices, propranolol (a non-selective beta-blocker) is the priority pharmacological intervention because it reduces cardiac output and causes splanchnic vasoconstriction, thereby lowering portal venous pressure and decreasing the risk of rebleeding. This is a well-established evidence-based approach for secondary prophylaxis of variceal hemorrhage. Placing the client in a supine position is inappropriate and potentially dangerous; the head of the bed should be elevated to reduce aspiration risk, especially in an actively bleeding patient. Initiating IV fluids without restriction is harmful because over-aggressive fluid resuscitation can raise portal pressure and precipitate rebleeding; volume replacement must be carefully titrated. Encouraging a high-fiber diet may be appropriate for general hepatic health and to prevent constipation in cirrhosis, but it has no direct role in managing or preventing further variceal bleeding and is not a priority intervention during an acute hemorrhagic event. Reducing portal pressure through propranolol directly addresses the underlying hemodynamic abnormality driving the complication.