Dementia can be prevented with proprietary Chinese medicines such as Cistanche Hibiscus Yizhi Capsule, Cistanche Hibiscus Yizhi Capsule, Nine Flavors of Beneficial Brain Granules and so on. 1. Cistanchiakis Capsules are effective in nourishing the liver, activating blood circulation and resolving turbidities, and strengthening the brain and increasing intelligence. It can be used in the treatment of mild to moderate vascular dementia with deficiency of the liver and kidney and phlegm and blood stasis obstruction, with specific symptoms such as diminished intellect, slow thinking, sluggishness, forgetfulness, uncertainty of joy and anger, dizziness and tinnitus, and sleeplessness and dreaming. After taking Cistanchiakisu Capsule, there are some adverse reactions such as panic, nausea, loose stools, itchy skin, etc. Contraindications are not clear. 2. Compound Cistanchesu Capsule has the efficacy of tonifying qi and nourishing blood, brain-healthy and wisdom, and can be used to treat amnesia which is a deficiency of qi and blood, with specific symptoms such as memory loss, fatigue (tiredness), dizziness and palpitation (rapid heartbeat, often accompanied by panic), etc. The drug can also be used to treat senile dementia. The drug can also treat senile dementia with the above symptoms. The adverse reactions and contraindications of Fufang Xuebenshu Capsules are not clear. 3. Jiuwei Yi Cerebral Granules has the effect of activating blood and removing phlegm, tonifying the kidney and benefiting the intellect, and is suitable for the treatment of vascular dementia in old age with the syndrome of insufficient medulla and phlegm and blood stasis blocking the collaterals, with the specific symptoms of forgetfulness, dullness and lack of speech, dizziness and tinnitus, numbness of limbs, and so on. Jiuwei Yi brain particles after taking medication occasionally see mild nausea, mouth and tongue sores, mild abdominal pain and diarrhea and other adverse reactions, contraindications are not yet clear. It is recommended that patients with dementia seek medical attention in a timely manner, by a professional Chinese medicine practitioner to identify the evidence for targeted treatment, prevention of dementia is also recommended under the guidance of a physician. If there is discomfort after using the drug, consult a doctor or go to the hospital for treatment.