Ann Intern Med. 2021 Feb 2. doi: 10.7326/M20-0202. Online ahead of print.
BACKGROUND: The efficacy of rifaximin in the secondary prevention of overt hepatic encephalopathy (HE) is well documented, but its effectiveness in preventing a first episode in patients after transjugular intrahepatic portosystemic shunt (TIPS) has not been established.
OBJECTIVE: To determine whether rifaximin prevents overt HE after TIPS compared with placebo.
DESIGN: Randomized, double-blind, multicenter, placebo-controlled trial. (ClinicalTrials.gov: NCT02016196).
PARTICIPANTS: 197 patients with cirrhosis undergoing TIPS for intractable ascites or prevention of variceal rebleeding.
INTERVENTION: Patients were randomly assigned to receive rifaximin (600 mg twice daily) or placebo, beginning 14 days before TIPS and continuing for 168 days after the procedure.
MEASUREMENTS: The primary efficacy end point was incidence of overt HE within 168 days after the TIPS procedure.
RESULTS: An episode of overt HE occurred in 34% (95% CI, 25% to 44%) of patients in the rifaximin group (n = 93) and 53% (CI, 43% to 63%) in the placebo group (n = 93) during the postprocedure period (odds ratio, 0.48 [CI, 0.27 to 0.87]). Neither the incidence of adverse events nor transplant-free survival was significantly different between the 2 groups.
LIMITATIONS: The study's conclusion applies mainly to patients with alcoholic cirrhosis, who made up the study population. The potential benefit of rifaximin 6 months after TIPS and beyond remains to be investigated.
CONCLUSION: In patients with cirrhosis treated with TIPS, rifaximin was well tolerated and reduced the risk for overt HE. Rifaximin should therefore be considered for prophylaxis of post-TIPS HE.
PRIMARY FUNDING SOURCE: French Public Health Ministry.