Do glucose tolerance drink sugar water, dizziness is recommended to measure blood glucose, blood pressure after symptomatic treatment (such as rest, eating, taking antihypertensive drugs, anti-sickness, etc.), as follows: 1. do glucose tolerance need to fasting with anhydrous glucose powder dissolved in 300ml water 75g after the blood draw to check the blood glucose situation, may be due to fasting too long hunger caused by dizziness, if the measurement of blood glucose is low, you can rest for a while, do the test after eating properly, if necessary, immediately eat, terminate the examination. 2. If high blood pressure is measured, it is considered that dizziness may be caused by high blood pressure, and it is recommended to take antihypertensive drugs to regulate blood pressure, such as nifedipine tablets, as prescribed by the doctor. 3. If blood glucose and blood pressure are normal, the patient is still dizzy, and accompanied by visual rotation, nausea, vomiting and other symptoms, to consider vertigo syndrome, it is recommended that the neurology department as soon as possible to improve the brain CT, cervical spine film and other tests to clarify the cause of dizziness and then give appropriate treatment. In conclusion, if you experience dizziness when drinking sugar water during a glucose test, it is recommended that you consult your outpatient doctor immediately.