abstract |
The present invention provides a method for stabilizing an anti-dementia drug, comprising adding a high-molecular weight acidic substance to a pharmaceutical composition containing the anti-dementia drug and a high-molecular weight basic substance. The present invention also provides a pharmaceutical composition comprising an anti-dementia drug and a high molecular weight basic substance, comprising a high molecular weight acidic substance for stabilizing the anti-dementia drug. Furthermore, the present invention provides a pharmaceutical composition comprising a step of adding a solution or suspension containing a high molecular weight acidic substance for stabilizing an anti-dementia drug to a mixture of the anti-dementia drug and a high molecular weight basic substance. Provide a method. |