There are many reasons for dizziness in IV, which should be treated according to different reasons.1, dizziness in IV may be caused by infusion too fast, if infusion is too fast, some people will have dizziness, such as hypertension and cerebrovascular disease, when infusion is too fast, it will increase cerebrovascular pressure, which will cause dizziness. At this time, as long as the infusion of drip speed slow down, dizziness symptoms can be relieved. 2, IV dizziness may also be caused by drugs, such as infusion of nitroglycerin and other vasodilators, some patients will appear dizziness, mainly due to the vasodilators into the blood vessels after the expansion of blood vessels in the brain to increase the phenomenon will cause people not adapt to the phenomenon of dizziness. In this case, the infusion rate should be adjusted to a very slow, the patient can get better after adaptation, if the patient can not adapt to change the drug treatment. 3, patients with dizziness may also be caused by the infusion reaction, some patients in the infusion can occur infusion reaction, nausea, headache, dizziness and other uncomfortable symptoms, it is necessary to check the cause and symptomatic treatment, if necessary, to change the drug treatment.