Patients with dizziness and nausea should be considered to have insufficient blood supply in the posterior circulation, which may be caused by the narrowing of cerebral arteriosclerosis, high viscosity of blood, and slowing down of cerebral blood flow. Oral medications to improve blood circulation can be given to improve the patient’s symptoms, for example, blood sparing, Ginkgo biloba extract injection, and tensin to improve the circulation, and patients can also take some oral medications to improve the patient’s blood circulation, such as blood plugging tablets, ginkgo biloba ketone ester drops, vermifuge snake Tongluo, compound Dilong capsule, and blood circulation capsule. If the patient has high blood lipids, he also needs to take oral atorvastatin calcium tablets to improve blood viscosity and lower blood lipids.