Dizziness caused by blood clots is usually a posterior circulation infarction, often involving the brainstem and cerebellum, and it usually lasts longer and is more persistent, and may take 2-3 months to get better. Generally, anti-dizziness drugs are commonly used, such as betahistine, difenidol, and also combined with Chinese medicines such as halo-fu-jing, vertigo-ning tablets or powerful dizziness tablets. At the same time, it is also necessary to use drugs for thrombosis, such as aspirin for anti-platelet aggregation and atorvastatin for lipid regulation and atherosclerotic plaque stabilization. There are also drugs that nourish nerves and improve microcirculation, such as cytarabine capsules and olanzapine capsules that nourish nerves and promote brain cell metabolism.