PURPOSE: To obtain an amyloid β-protein coagulation and/or deposition inhibitor useful for preventing and treating Alzheimer's disease, containing, as active ingredient, a hydroquinone or quinone compound.
CONSTITUTION: This inhibitor contains, as active ingredient, 1-70 (pref. 5-50)wt.% of a hydroquinone or quinone compound of formula I, II or III. Using an appropriate vehicle etc., this inhibitor can be manufactured into pharmaceutical preparations in the form of an oral agent such as capsules, tablets, granules, powder, suspension, liquid or syrup, an injection, suppository, or agent for external use. The hydroquinone or quinone compound has activity to inhibit amyloid β-protein coagulation and/or deposition and also has action of suppressing the neurocytotoxicity due to amyloid β-protein.
SUWA YORIMASA
ENDO NORIAKI
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