Simvastatin Lowers Portal Pressure in Patients With Cirrhosis and Portal Hypertension: A Randomized Controlled Trial

Background & AimsSimvastatin improves liver generation of nitric oxide and hepatic endothelial dysfunction in patients with cirrhosis, so it could be an effective therapy for portal hypertension. This randomized controlled trial evaluated the effects of continuous simvastatin administration on the hepatic venous pressure gradient (HVPG) and its safety in patients with cirrhosis and portal hypertension.MethodsFifty-nine patients with cirrhosis and portal hypertension (HVPG ≥12 mm Hg) were randomized to groups that were given simvastatin 20 mg/day for 1 month (increased to 40 mg/day at day 15) or placebo in a double-blind clinical trial. Randomization was stratified according to whether the patient was being treated with β-adrenergic blockers. We studied splanchnic and systemic hemodynamics and variables of liver function and safety before and after 1 month of treatment.ResultsSimvastatin significantly decreased HVPG (−8.3%) without deleterious effects in systemic hemodynamics. HVPG decreases were observed in patients who were receiving β-adrenergic blockers (−11.0%; P = .033) and in those who were not (−5.9%; P = .013). Simvastatin improved hepatic, fractional, and intrinsic clearance of indocyanine green, showing an improvement in effective liver perfusion and function. No significant changes in HVPG and liver function were observed in patients receiving placebo. The number of patients with adverse events did not differ significantly between groups. No patient was withdrawn from the study based on adverse events.ConclusionsSimvastatin decreased HVPG and improved liver perfusion in patients with cirrhosis. These effects were additive with those of β-adrenergic blockers. The beneficial effects of simvastatin should be confirmed in long-term clinical trials for portal hypertension.