A method of treating and/or preventing gastric ulcers, said method comprising administering by injection a therapeutically effective amount of a composition comprising: c) a first agent selected from the group consisting of: a medium chain triglyceride and a long chain triglyceride； and d) a second agent comprising a proton pump inhibitor or pharmaceutically or veterinary acceptable salt, wherein the composition is adapted for sustained release of a therapeutically effective amount of the proton pump inhibitor to a subject in need thereof.
