Abstract: The present invention is directed to a pharmaceutical composition comprising rebamipide having a mean particle size of less than 500 nm, a dispersing agent, and a viscosity enhancing agent wherein the viscosity enhancing agent has no aggregative action for the rebamipide particles, which is used as a gargle or a liquid preparation for swish and swallow comprising rebamipide for preventing and/or treating stomatitis caused by radiotherapy.

Abstract: A method for preventing and treating disturbances of intestinal mucous membrane comprising administering to a patient in need thereof an effective amount of the compound 2-(4-chlorobenzoylamino)-3-(2-quinolon-4-yl) propionic acid or a pharmaceutically acceptable salt thereof.

Abstract: A method for treating diabetes mellitus comprising administering to a patient in need thereof a pharmaceutically acceptable inert carrier in combination with an effective amount for treating diabetes mellitus of a carbostyril compound or a pharmaceutically acceptable salt thereof of the formula: ##STR1## wherein R is a halogen atom, the position of substitution of the side chain in the carbostyril skeleton being at the 3- or 4-position and the bond between the 3-position and the 4-positions in the carbostyril skeleton being a single bond or a double bond.

Abstract: An agent for increasing secretion of somatostatin or inhibiting decrease of secretion of somatostatin which comprises as an active ingredient a carbostyril compound of the formula: ##STR1## or a salt thereof, which is useful for treating diseases associated with the decrease of somatostatin such as esophagitis, Alzheimer's disease, etc.