Clinical trial: short-term effects of combination of satavaptan, a selective vasopressin V2 receptor antagonist, and diuretics on ascites in patients with cirrhosis without hyponatraemia-a randomized, double-blind,placebo-controlled study

BACKGROUND: There is little information on the effects of vaptans in patients with cirrhosis. AIM: To investigate the short-term effects of satavaptan, a selective vasopressin V2 receptor antagonist on ascites in cirrhosis without hyponatraemia. METHODS: A total of 148 patients with cirrhosis, ascites and serum sodium >130 mmol/L were included in a multicentre, double-blind, randomized, controlled study of 14 days comparing three fixed doses of satavaptan (5 mg, 12.5 mg or 25 mg once daily) vs. placebo. Average MELD scores were: 13.4, 12.3, 13.8 and 13.1 respectively. All patients received spironolactone 100 mg/day plus furosemide 20-25 mg/day. RESULTS: Satavaptan treatment was associated with a decrease in ascites (mean change in body weight was -0.36 kg (+/-3.03) for placebo vs. -2.46 kg (+/-3.11), -2.08 kg (+/-4.17) and -2.28 kg (+/-3.24) for the 5 mg, 12.5 mg and 25 mg doses respectively; P = 0.036, P = 0.041 and P = 0.036 for satavaptan 5, 12.5 and 25 mg/day vs. placebo respectively). Thirst and slight increases in serum sodium were more common in patients treated with satavaptan compared with placebo, while other adverse events were similar. CONCLUSIONS: The administration satavaptan for a 14-day period is associated with reduction in ascites in patients with moderately severe cirrhosis without hyponatraemia under diuretic treatment.