Sudden dizziness and blurred vision may be caused by ischemia in the posterior circulation. Due to ischemia in the cerebellum, brainstem or occipital lobe, the patient may experience dizziness and blurred vision and visual field defects. In this case, the patient should be given treatment to improve circulation, activate blood circulation and remove blood stasis, and can be given oral or sedative ginkgo biloba preparations. Also, vasodilators, such as fasudil hydrochloride or nimodipine, can be used. After drug treatment, the patient’s ischemic symptoms are relieved and the dizziness and blurred vision can be significantly relieved. Sudden dizziness and blurred vision can also be seen in peripheral vertigo attacks, such as Meniere’s syndrome or benign paroxysmal positional vertigo. As a result of a vertigo attack, the patient can experience intense dizziness, which can also be accompanied by symptoms such as blurred vision or shaky vision. For this condition, the patient can be given vestibular depressants such as betahistine mesylate or flunarizine hydrochloride, if necessary.