An object of the present invention is to provide, for the case of implementing a therapeutic method in which at least two kinds of anti-dementia drugs are used together, a composition that has a good therapeutic effect on dementia, and also gives excellent compliance. Another object of the present invention is to provide a composition containing at least two kinds of anti-dementia drugs, in which release of the anti-dementia drugs from the composition is controlled, whereby a combined effect of the anti-dementia drugs can be achieved well. Still another object of the present invention is to provide a composition for which the frequency of administration and the amount taken are reduced and hence compliance can be improved, and a method of manufacturing such a composition. According to the present invention, there is provided a composition containing at least two kinds of anti-dementia drugs such a composition containing at least one sustained-release portion containing an anti-dementia drug and such a composition containing at least one cholinesterase inhibitor, and at least one N-methyl-D-aspartate receptor antagonist.
