Takeda, another Japanese firm, also has a cholinesterase inhibitor on trial, as do Bayer, of Germany, and Forest Laboratories, an American firm.

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Effects of the traditional Chinese herbal medicine Yi-Gan San for cholinesterase inhibitor-resistant visual hallucinations and neuropsychiatric symptoms in patients with dementia with Lewy bodies.

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It is often used in combination with a cholinesterase inhibitor.

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Aricept, made by Eisai, of Japan, is another cholinesterase inhibitor.

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