Study	Reason for exclusion
Andersen 1983	It is not a randomised trial.
Attwell 2005	It is not a randomised trial, and the treatment given does not include antacids.
Bachir 1981	It is not a randomised trial.
Jackson 2003	It is not a randomised trial.
Kumar 1984	It is a randomised trial, but the included patients have duodenal ulcers.
Londong 1983	It is not a randomised trial.
Macdougall 1977	It is a randomised trial, but the included patients have fulminant hepatic failure.
Meshkinpour 1977	It is a randomised trial, but the included patients have reflux gastritis.
Narendranathan 1999	It is a randomised trial, but the included patients have acute viral hepatitis.
Priebe 1980	It is a randomised trial, but the included patients are critically ill patients.
Snady 1989	It is a randomised controlled trial, but antacids in this trial were given to prevent stricture formation after endoscopic sclerotherapy of oesophageal varices.
Winston 2002	It is a randomised controlled trial, but the included patients are liver transplant recipients.
Yang 1998	It is a randomised trial, but the included patients have endoscopic variceal sclerotherapy induced ulcer and the trial does not study antacids.
Zuckerman 1984	It is a randomised trial, but it does not include antacids.