The present invention provides a medicine for preventing or treating a
diabetes, which includes 2,2-dichloro-12-(4-chlorophenyl)-dodecanoic acid
or a pharmacologically acceptable salt thereof, and pioglitazone
hydrochloride as active ingredients. The present invention provides a
method for preventing or treating a diabetes, which includes
administering 2,2-dichloro-12-(4-chlorophenyl)-dodecanoic acid or a
pharmacologically acceptable salt thereof, and pioglitazone hydrochloride
to a patient suffering from or having a possibility of suffering from
diabetes.